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Average temperature trends across Western Australia


Below is an approximate 100 year comparison of average annual mean minimum and maximum temperatures at 32 different locations across Western Australia, including weather in the capital city of Perth.

The temperature averages have been extracted from the database publicly available at the Australian Bureau of Meteorology website for Western Australia, and from the first ever climate study conducted in the colony of Western Australia before 1900.

32 combined average temperatures
Hot spots
Coastal locations above 20,000 people
Coastal locations below 20,000 people
Inland locations
All locations except hot spots
Met Bureau corrected data 1910-2008
Earlier data vs latest reliable data
Earliest colonial data comparison
Met Bureau analysis and forecasts
Climate change in the Press
Contact

The 32 locations are selected as these are the only ones on the public database with consistent historic weather records from around 1900 to 2000 and/or 2010. Some location records precede 1900 and some begin just after 1900.

Some locations have seen their temperature recording stations moved since 1900, often from the town post office to a nearby airport. These locational changes may affect temperature readings.

Aerial photographs are linked below so you can see the changes in location.

The annual mean minimum and maximum data are also linked below where available at locations surveyed by the Bureau of Meteorology in its analysis of "corrected" temperature trends from 1910 to 2008.

Average mean minimum and maximum temperatures are calculated from December 2013 to November 2014, the most recent 12 month timeframe. Albeit accurate, this recent 12 month data for each location should be considered statistically unreliable due to its brevity compared with "climate normals" that have typical year-to-year weather variations smoothed over standard periods (commonly 30 years).

This page is designed to provide a simple, convenient tool for people to observe temperature trends since weather records began in Western Australia, particularly in the context of perceived climate change.


Spotlights


The state of Western Australia covers 2,532,400 square kilometres and was proclaimed a British colony in 1829. The eastern border is 1,862 kilometres long and there is 12,889 kilometres of coastline. The highest elevation is Mt Meharry at 1,249 metres (4,098 feet). Western Australia had a population of 2.2 million in 2009, an increase of 17% since 2000.

Western Australia's capital of Perth is said to be on the coalface of global climate change, with 2007 Australian of the Year and Climate Change Commission chairman Tim Flannery predicting in 2004 that it may become the first city in the world to become a ghost metropolis due to lack of water (BBC, Sydney Morning Herald).


Combined average mean temperatures in all 32 locations across Western Australia
Albany, Balladonia, Bridgetown, Broome, Bunbury, Busselton, Cape Leeuwin, Cape Naturaliste, Carnarvon, Derby, Donnybrook, Esperance, Eucla, Eyre, Geraldton, Halls Creek, Kalgoorlie, Katanning, Kellerberrin, Laverton, Marble Bar, Merredin, Mt Barker, Northam, Onslow, Perth, Rottnest Island, Southern Cross, Wandering, Wiluna, Wyndham, York


Minima

Late 1800s/early 1900s minima - 415 / 32 = 12.96
Late 1900s/early 2000s minima - 431.8 / 32 = 13.52
December 2013 - November 2014 minima - 447.43 / 32 = 14.98

  • Average mean minimum in all 32 locations combined has risen 0.56 degrees C from early to late 20th century
  • Average mean minimum in all 32 locations combined has risen 1.02 degrees C from early 1900s to 2014


Maxima

Late 1800s/early 1900s maxima - 804.1 / 32 = 25.12
Late 1900s/early 2000s maxima - 820.8 / 32 = 25.64
December 2013 - November 2014 maxima - 853.43 / 32 = 26.67

  • Average mean maximum in all 32 locations combined has risen .52 degrees C from early to late 20th century
  • Average mean maximum in all 32 locations combined has risen 1.41 degrees C from early 1900s to 2014

Note: these calculations exclude February 2011 for Marble Bar, which the Bureau of Meteorology reports had no data available for the month. February 2011 temperatures for Marble Bar are similarly missing from all calculations below.

Note: Busselton weather station closed in November 2011 and all temperatures below from December 2011 are sourced to Busselton Aero. Read more ...

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Hot spots

It should be noted that city and large town temperature readings may be influened by urban heat islands.

Also, it is difficult to compare all locations in Western Australia without accounting for temperatures in coastal cities and towns that are strongly influenced by ocean proximity. Overnight minima in coastal locations are several degrees warmer than inland locations because of the thermal blanket created by the ocean, and strong sea breezes reduce daytime temperatures along much of Western Australia's coastline during early-mid summer.

These natural variables have little impact on inland temperatures and this may influence comparative locational analysis.

About 83% of Western Australia's total population live in the 15 coastal cities and towns with temperatures recorded by the Australian Bureau of Meteorology since the year 1900.

The five coastal locations in Western Australia with populations above 20,000 (Albany, Bunbury, Busselton, Geraldton, Perth) have been major and expanding urban centres since colonial settlement in the early 19th century. Not surprisingly, the capital city of Perth (population 1.6 million in 2009) had the highest averaged increase in mean maximum temperature among all 32 locations, including pre-1910 data, over the hundred years (1.7 degrees C). However, it should be noted that changes in temperature recording location from Mt Eliza near the central city to the northern suburb of Mt Lawley mean Perth only has a reliable history beginning in 1994.

A temperature history comparison between the five large coastal centres and all other surveyed coastal locations suggests that the heat sink created by population and social infrastructure adds between .5 and 1 degree C to daytime maximum temperatures.

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Coastal locations with 2006 population above 20,000
Albany, Bunbury, Busselton, Geraldton, Perth


Minima

Late 1800s/early 1900s minima - 58.9 / 5 = 11.78
Late 1900s/early 2000s minima - 63.81 / 5 = 12.53
December 2013 - November 2014 minima - 62.78 / 5 = 12.56

  • Average mean minimum in 5 locations combined has risen .81 degrees C from early to late 20th century
  • Average mean minimum in 5 locations combined has risen .88 degrees C from early 1900s to 2014

Note: Minima are affected by relocation of temperature ground stations in all five large coastal locations during the 20th century, with consequent falls in recorded overnight minima due to greater distance from the ocean and removal of the urban heat influence. Check all five locations below (except Busselton) to confirm significant falls in minima coinciding with ground station relocations (Albany, Bunbury, Busselton, Geraldton, Perth).


Maxima

Late 1800s/early 1900s maxima - 109.5 / 5 = 21.90
Late 1900s/early 2000s maxima - 115 / 5 = 23
December 2013 - November 2014 maxima - 120.9 / 5 = 24.18

  • Average mean maximum in 5 locations combined has risen 1.10 degrees C from early to late 20th century
  • Average mean maximum in 5 locations combined has risen 2.28 degrees C from early 1900s to 2014

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Coastal locations with 2006 population below 20,000
Broome, Cape Leeuwin, Cape Naturaliste, Carnarvon, Derby, Esperance, Eucla, Eyre, Onslow, Rottnest Island, Wyndham


Minima

Late 1800s/early 1900s minima - 174.8 / 11 = 15.89
Late 1900s/early 2000s minima - 180.3 / 11 = 16.39
December 2013 - November 2014 minima - 185.13 / 11 = 16.83

  • Average mean minimum in 11 locations combined has risen .5 degrees C from early to late 20th century
  • Average mean minimum in 11 locations combined has risen 0.94 degree C from early 1900s to 2014

Maxima

Late 1800s/early 1900s maxima - 285.8 / 11 = 25.98
Late 1900s/early 2000s maxima - 291.5 / 11 = 26.5
December 2013 - November 2014 maxima - 303.23 / 11 = 27.57

  • Average mean maximum in 11 locations combined has risen .52 degrees C from early to late 20th century
  • Average mean maximum in 11 locations combined has risen 1.69 degrees C from early 1900s to 2014

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Inland temperatures
16 remaining inland towns
Balladonia, Bridgetown, Donnybrook, Halls Creek, Kalgoorlie, Katanning, Kellerberrin, Laverton, Marble Bar, Merredin, Mt Barker, Northam, Southern Cross, Wandering, Wiluna, York


Minima

Late 1800s/early 1900s minima - 181.4 / 16 = 11.33
Late 1900s/early 2000s minima - 193 / 16 = 12.06
December 2013 - November 2014 minima - 199.52 / 16 = 12.47

  • Average mean minimum in 16 inland locations combined has risen .73 degrees C from early to late 20th century
  • Average mean minimum in 16 inland locations combined has risen 1.15 degrees C from early 1900s to 2014

Maxima

Late 1800s/early 1900s maxima - 409.1 / 16 = 25.56
Late 1900s/early 2000s maxima - 412.6 / 16 = 25.78
December 2013 - November 2014 maxima - 429.29 / 16 = 26.83

  • Average mean maximum in 16 inland locations combined has risen .22 degrees C from early to late 20th century
  • Average mean maximum in 16 inland locations combined has risen 1.27 degrees C from early 1900s to 2014

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All locations except the five urban hot spots
Balladonia, Bridgetown, Broome, Cape Leeuwin, Cape Naturaliste, Carnarvon, Derby, Donnybrook, Esperance, Eucla, Eyre, Halls Creek, Kalgoorlie, Katanning, Kellerberrin, Laverton, Marble Bar, Merredin, Mt Barker, Northam, Onslow, Rottnest Island, Southern Cross, Wandering, Wiluna, Wyndham, York


Alternatively, the five major towns and cities can be compared with all 27 coastal and inland locations over 100 years.

As well as coastal vs inland natural variables, this comparison should create an upward bias on averages because all five towns and cities excluded from the 27 locations are in the coastal southern half of Western Australia, which is much cooler than the northern half and/or inland throughout the year.


Minima

Late 1800s/early 1900s minima - 356.1 / 27 = 13.18
Late 1900s/early 2000s minima - 372.6 / 27 = 13.83
December 2013 - November 2014 minima - 384.65 / 27 = 14.25

  • Average mean minimum in 27 locations combined has risen .65 degrees C from early to late 20th century - compared to a rise of .56 degrees C for all 32 locations including Albany, Bunbury, Busselton, Geraldton, Perth (these five locations alone increased .68 degrees C).
  • Average mean minimum in 27 locations combined has risen 1.07 degrees C from early 1900s to 2014 - compared to a rise of 1.02 degrees C for all 32 locations including Albany, Bunbury, Busselton, Geraldton, Perth (these five locations alone rose .88 degrees C).

Maxima

Late 1800s/early 1900s maxima - 694.6 / 27 = 25.72
Late 1900s/early 2000s maxima - 704.5 / 27 = 26.08
December 2013 - November 2014 maxima - 732.53 / 27 = 27.13

  • Average mean maximum in 27 locations combined has risen .36 degrees C from early to late 20th century - compared to a rise of .52 degrees C for all 32 locations including Albany, Bunbury, Busselton, Geraldton, Perth (these five locations alone increased 0.56 degrees C).
  • Average mean maximum in 27 locations combined has risen 1.41 degrees C from early 1900s to 2014 - compared to a rise of 1.41 degrees C for all 32 locations including Albany, Bunbury, Busselton, Geraldton, Perth (these five locations alone increased 2.28 degrees C).

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Bureau of Meteorology "high quality" data since 1910


For 26 locations in Western Australia, the Bureau of Meteorology provides "high quality" annual data since 1910.

The bureau states that weather recordings prior to 1910 are unreliable for comparison. Regulated recording methods were introduced as of 1910 and the data the bureau supplies has been homogenized and corrected to account for artificial factors such as changes in site location, exposure, instrumentation or observation procedures (... more).

Twenty of these locations are among the 32 surveyed by this web page and their annual temperature data files (1910-2010) are linked below, including averaged 30 year temperatures from 1910 to 1939 and from 1980 to 2009, plus charts of min/mean/max temperatures since 1910:


Coastal:
Albany Airport minimum / mean / maximum / temperature chart 1910-2010
Broome Airport minimum / mean / maximum / temperature chart 1910-2010
Cape Leeuwin minimum / mean / maximum / temperature chart 1910-2010
Cape Naturaliste minimum / mean / maximum / temperature chart 1910-2010
Carnarvon Airport minimum / mean / maximum / temperature chart 1910-2010
Derby Aero minimum / mean / maximum / temperature chart 1910-2010
Esperance minimum / mean / maximum / temperature chart 1910-2010
Geraldton Airport minimum / mean / maximum / temperature chart 1910-2010
Perth Airport minimum / mean / maximum / temperature chart 1910-2010
Rottnest Island minimum / mean / maximum / temperature chart 1910-2010

Inland:
Bridgetown Post Office minimum / mean / maximum / temperature chart 1910-2010
Halls Creek Airport minimum / mean / maximum / temperature chart 1910-2010
Kalgoorlie-Boulder Airport minimum / mean / maximum / temperature chart 1910-2010
Katanning minimum / mean / maximum / temperature chart 1910-2010
Kellerberrin minimum / mean / maximum / temperature chart 1910-2010
Marble Bar minimum / mean / maximum / temperature chart 1910-2010
Merredin minimum / mean / maximum / temperature chart 1913-2010
Southern Cross minimum / mean / maximum / temperature chart 1910-2010
Wandering minimum / mean / maximum / temperature chart 1910-2010
York minimum / mean / maximum / temperature chart 1910-2010


Following is a summary of "high quality" data for the 20 locations:


Minima

  • For all 20 locations, the average mean minimum has risen .7 degrees C from 1910-1939 to 1981-2010
  • For 10 coastal locations, the average mean minimum has risen .64 degrees C from 1910-1939 to 1981-2010
  • For 10 inland locations, the average mean minimum has risen .76 degrees C from 1910-1939 to 1981-2010

Maxima

  • For all 20 locations, the average mean maximum has risen .61 degrees C from 1910-1939 to 1981-2010
  • For 10 coastal locations, the average mean maximum has risen .54 degrees C from 1910-1939 to 1981-2010
  • For 10 inland locations, the average mean maximum has risen .68 degrees C from 1910-1939 to 1981-2010


The Bureau of Meteorology also maintains six other high quality climate sites in Western Australia with temperature records not dating back to 1900. Temperature history charts have been created for these locations - Giles Meteorological Office, Jarrahwood, Meekathara Airport, Newman Aero, Port Hedland, Roebourne.

A chart is available to see all 26 high quality recording sites maintained across Western Australia by the Bureau of Meteorology with minimum, mean and maximum temperatures averaged every year for all locations from 1910 to 2009.

For more recent temperatures, a chart is available to see all 26 high quality recording sites maintained across Western Australia by the Bureau of Meteorology with minimum, mean and maximum temperatures averaged every year for all locations from 1979 to 2009.

Comparing 1979-1989 with 1999-2009, the average mean temperature across all 26 "high quality" locations increased by 0.197C over the 31 year period. Comparing 1990-1999 with 2000-2009, the average mean temperature across all 26 "high quality" locations fell by 0.0006C.

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Earlier data compared to latest "corrected" data


Although the pre-1910 temperature recordings in each location examined below are considered by the Bureau of Meteorology to be unreliable compared to the regulated post-1910 data, it is still worth comparing these earliest temperatures with the most recent "corrected" data from 1979-2008 in the 20 locations.


Minima

  • For all 20 locations, the average mean minimum rose .44 degrees C from ~1900 to 1979-2008
  • For 10 coastal locations, the average mean minimum rose .29 degrees C from ~1900 to 1979-2008
  • For 10 inland locations, the average mean minimum rose .58 degrees C from ~1900 to 1979-2008

Maxima

  • For all 20 locations, the average mean maximum rose .48 degrees C from ~1900 to 1979-2008
  • For 10 coastal locations, the average mean maximum rose .86 degrees C from ~1900 to 1979-2008
  • For 10 inland locations, the average mean maximum rose .10 degrees C from ~1900 to 1979-2008


Temperature data is adjusted by various authorities due to perceived artificial factors such as changes in site location, exposure, instrumentation or observation procedures, etc, and the accuracy of all data sets is controversial. See the different historic trends interpreted for Albany, Broome, Cape Leeuwin, Cape Naturaliste, Carnarvon, Derby, Esperance, Geraldton, Halls Creek, Kalgoorlie, Katanning, Kellerberrin, Marble Bar, Merredin, Perth, Rottnest Island, Southern Cross, Wandering and York.

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Earliest colonial climate data compared to the latest quality data


The West Australian colony's earliest known meteorological analysis is The Climate of Western Australia 1876-1899 (PDF 25.4mb) compiled in 1901 by then Government Astronomer William Ernest Cooke. This document contains raw, unregulated data that is considered unreliable.

As the Government Astronomer explains in this historic document: "... it may be safely assumed that the results in this document give a close approximation to the truth; sufficiently so for all practical purposes, but scarcely to be considered quite accurate enough for the scientist."

Nevertheless, this compilation contains the only known official climate records for the Western Australia colony before 1900 and although recording discrepancies may have been common, these mistakes might either inflate or deflate the real temperatures (e.g. thermometers near warm buildings or in cool locations, although a common error was heat radiation from the ground).

The pre-1900 records are thus worth comparing with the most recent 30 years of regulated quality data from the Bureau of Meteorology, if only out of curiosity. See a detailed breakdown comparison of temperatures from the Cooke document.

western australia climate analysis

(PDF 25.4mb)


Minima

Towns surveyed for mean minimum night temperatures by the Government Astronomer that are included in the Bureau of Meteorology's quality control sites include Albany (11.4 C), Broome (20.1 C), Cape Leeuwin (14 C), Carnarvon (16 C), Derby (21 C), Esperance (11.3 C), Geraldton (13.9 C), Kalgoorlie (12.2 C), Katanning (8.4 C), Perth (12.3 C), Rottnest (13.3 C), Southern Cross (10.2 C) and York (11 C).

Combined, these 13 pre-1900 minima average 13.5 degrees C. Combining the same locations among the Bureau's quality controlled sites from 1979 to 2008, the average minimum is .37 degrees C warmer than 1876-1899 at 13.87 degrees C.

Combining the same 13 locations from December 2013 to November 2014, the average minimum is 1.15 degrees C warmer than 1876-1899 at 14.65 degrees C.

Maxima

Towns surveyed for mean maximum day temperatures by the Government Astronomer that are included in the Bureau of Meteorology's quality control sites include Albany (18.5 C), Broome (31.7 C), Cape Leeuwin (19.6 C), Carnarvon (28.7 C), Derby (33.7 C), Esperance (21.4 C), Geraldton (24.5 C), Kalgoorlie (25.5 C), Katanning (22.5 C), Perth (24.2 C), Rottnest, (22.2 C), Southern Cross (26 C) and York (24 C).

Combined, these 13 pre-1900 maxima average 24.80 degrees C. Combining the same locations among the Bureau's quality controlled sites from 1979 to 2008, the average maximum is .34 degrees C warmer than 1876-1899 at 25.14 degrees C.

Combining the same 13 locations from December 2013 to November 2014, the average maximum is 1.32 degrees C warmer than 1876-1899 at 26.11 degrees C.


Another historic document analysing Western Australia's past climate is Results of Meteorological Observations in Western Australia during 1908 (PDF 28mb) published in 1912 by then Commonwealth Meteorologist Henry Ambrose Hunt. Also of interest is The Climate and Weather of Australia (PDF 29mb), the first textbook on Australian Meteorology, published in 1913 by Henry Hunt and associates. See Hunt vs BoM temperature comparison for Australian capital cities.

For locations below that were monitored by Government Astronomer William Ernest Cooke, his recordings are listed as Pre-1900 vs recent 30 years mean temperature.




Albany (BoM station 9500)
(Central Albany population 2006 - 31,575)

Pre-1900 vs recent 30 years mean temperature
1880-1899 (20 years surveyed) 59 F = 15 C
1981-2010 (30 years) Albany Airport = 15.3 C

1881-1910 at Albany
(elevation 3m, 30 years)
Average mean minimum 11.2
Average mean maximum 18.9

1921-1950 (30 years) / min 11.6 / max 19.8
1931-1960 (30 years) / min 11.7 / max 19.7
1941-1970 (24 years) / min 11.9 / max 19.7
1951-1965 (14 years) / min 12.1 / max 19.6

Relocation to Albany Airport
(elevation 68m, 12km distance)
1961-1990 (26 years) / min 10.4 / max 20.3
1971-2000 (30 years) / min 10.6 / max 20.3

1981-2010 (30 years)
Average mean minimum 10.6
Average mean maximum 20

12 months December 2013 - November 2014 at Albany
Mean annual minimum 13.1
Mean annual maximum 20.3

BoM average means all available years
Mean annual minimum 11.7
Mean annual maximum 19.5

average temperatures in albany western australia




Annual minimum temperature data 1910-2008

Annual maximum temperature data 1910-2008

Recent picture of Albany Airport weather recording station

Albany min/max temperature chart 1880-2008

Albany Airport min/mean/max chart 1910-2010

BoM historic annual minima from 1880

BoM historic annual maxima from 1880

BoM/GISS/HadCRUT historic data comparison for Albany


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Balladonia (BoM station 11017)
(elevation 151m, population 2006 - 50)

1891-1920 (20 years surveyed)
Average mean minimum 9.7
Average mean maximum 23.8

1921-1943 (22 years) / min 9.6 / max 24.2
1931-1943 (12 years) / min 9.5 / max 24.2
1951-1980 (16 years) / min 9.9 / max 25.1
1965-1990 (25 years) / min 9.9 / max 25.2
1971-2000 (30 years) / min 10.0 / max 25.3

1981-2010 (30 years)
Average mean minimum 10.1
Average mean maximum 25.3

12 months December 2013 - November 2014
Mean annual minimum 10.5
Mean annual maximum 25.7

BoM average means all available years
Mean annual minimum 9.8
Mean annual maximum 24.7

average temperatures in balladonia western australia



Balladonia aerial picture

BoM historic annual minima from 1901

BoM historic annual maxima from 1901


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Bridgetown (BoM station 9617)
(elevation 150m, shire population 2006 - 3,953)

1891-1920 (20 years surveyed)
Average mean minimum 7.5
Average mean maximum 22.0

1921-1950 (30 years) / min 7.6 / max 22.5
1931-1960 (30 years) / min 7.4 / max 22.6
1941-1970 (30 years) / min 7.6 / max 22.4
1951-1965 (30 years) / min 8.0 / max 22.4
1961-1990 (30 years) / min 8.4 / max 22.2
1971-2000 (30 years) / min 8.7 / max 22.3

1981-2010 (30 years)
Average mean minimum 8.8
Average mean maximum 22.5

12 months December 2013 - November 2014
Mean annual minimum 9.0
Mean annual maximum 22.8

BoM average means all available years
Mean annual minimum 8.4
Mean annual maximum 22.4

Annual minimum temperature data 1910-2008

Annual maximum temperature data 1910-2008

average temperatures in bridgetown western australia


Street view picture of Bridgetown recording station

Recent picture of weather recording station

Bridgetown Post Office min/mean/max chart 1910-2010

BoM historic annual minima from 1901

BoM historic annual maxima from 1901

BoM/GISS/HadCRUT historic data comparison for Bridgetown

Bridgetown aerial picture


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Broome (BoM station 3003)
(shire population 2006 - 13,218)

Pre-1900 vs recent 30 years mean temperature
1894-1899 (5 years surveyed) 78.6 F = 25.9 C
1981-2010 (30 years) Broome Airport = 26.7 C

1894-1920 at Broome Post Office
(elevation 19m, 27 years)
Average mean minimum 21.0
Average mean maximum 31.8

1921-1950 (28 years) / min 21.2 / max 32.2
1931-1960 (21 years) / min 21.2 / max 32.4
1941-1953 (11 years) / min 21.1 / max 32.9

Relocation to Broome Airport
(elevation 7m, 1.6km distance)
1941-1970 (30 years) / min 21.2 / max 32.2
1951-1980 (30 years) / min 21.2 / max 32.1
1961-1990 (30 years) / min 21.1 / max 32.2
1971-2000 (30 years) / min 21.2 / max 32.2

1981-2010 (30 years)
Average mean minimum 21.1
Average mean maximum 32.2

12 months December 2013 - November 2014
Mean annual minimum 21.5
Mean annual maximum 33.0

BoM average means all available years
Mean annual minimum 21.2
Mean annual maximum 32.2

average temperatures in broome western australia




Annual minimum temperature data 1910-2008

Annual maximum temperature data 1910-2008

Recent picture of weather recording station

Broome min/max temperature chart 1895-1952

Broome Airport min/mean/max chart 1910-2010

BoM historic annual minima from 1939

BoM historic annual maxima from 1939

BoM/GISS/HadCRUT historic data comparison for Broome


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Bunbury (BoM station 9965)
(city population 2006 - 29,702)

Pre-1900 vs recent 30 years mean temperature
1880-1899 (18 years surveyed) 61.4 F = 16.3 C
1995-2010 (15 years) = 17 C

1882-1910 at Bunbury Post Office
(elevation 4m, 28 years)
Average mean minimum 11.2
Average mean maximum 21.7

1921-1950 (28 years) / min 11.5 / max 21.8
1931-1956 (26 years) / min 11.4 / max 21.6
1941-1970 (22 years) / min 11.6 / max 21.5
1951-1980 (22 years) / min 12.1 / max 21.7
1965-1985 (21 years) / min 12.4 / max 21.9
1971-1985 (15 years) / min 12.5 / max 22.0

Relocation to Bunbury
(elevation 5m, 3.6km distance)

1995-2010 (15 years)
Average mean minimum 10.9
Average mean maximum 23

12 months December 2013 - November 2014
Mean annual minimum 11.4
Mean annual maximum 24.1

BoM average means all available years
Mean annual minimum 10.9
Mean annual maximum 23

average temperatures in bunbury western australia





BoM historic annual minima 1880 to 1985

BoM historic annual minima from 1995

BoM historic annual maxima 1880 to 1985

BoM historic annual maxima from 1995


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Busselton (BoM station 9569)
(shire population 2006 - 25,354)

1900-1910 at Busselton Shire
(elevation 4m, 11 years surveyed)
Average mean minimum 9.8
Average mean maximum 21.5

1921-1950 (30 years) / min 10.2 / max 22.1
1931-1960 (30 years) / min 10.3 / max 22.2
1941-1970 (30 years) / min 10.7 / max 22.1
1951-1975 (25 years) / min 10.9 / max 22.1
1961-1975 (15 years) / min 11.2 / max 22.1

Relocation to Busselton
(9569 - elevation 4m, 2.5km distance)

1998-2010 (12 years)
Average mean minimum 11.2
Average mean maximum 22.7

1998-2011 (13 years)
Average mean minimum 11.3
Average mean maximum 22.8

Relocation to Busselton Aero
(9603 - elevation 16m, 8.2km from Busselton, 5.8km from Busselton Shire) in November 2011. Read more ...

12 months December 2013 - November 2014
Mean annual minimum 10.6
Mean annual maximum 23.5

BoM average means all available years
Mean annual minimum 11.3
Mean annual maximum 22.8

average temperatures in busselton western australia


Note re Busselton station relocation


BoM historic annual minima 1900 to 1975

BoM historic annual minima from 1998

BoM historic annual maxima 1900 to 1975

BoM historic annual maxima from 1998

BoM/GISS historic data comparison for Busselton


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Cape Leeuwin (BoM station 9518)
(elevation 13m, nearest town Augusta 6.9km away with 2006 population around 1,100)

Pre-1900 vs recent 30 years mean temperature
1897-1899 (3 years surveyed) 62.2 F = 16.8 C
1981-2010 (30 years) = 17.2 C

1901-1930 (30 years)
Average mean minimum 14.0
Average mean maximum 19.6

1921-1950 (30 years) / min 14.0 / max 19.4
1931-1960 (30 years) / min 14.0 / max 19.4
1941-1970 (30 years) / min 13.9 / max 19.5
1951-1980 (30 years) / min 13.9 / max 19.6
1961-1990 (30 years) / min 14.0 / max 19.9
1971-2000 (30 years) / min 14.2 / max 20.0

1981-2010 (30 years)
Average mean minimum 14.4
Average mean maximum 20.1

12 months December 2013 - November 2014
Mean annual minimum 15.1
Mean annual maximum 20.7

BoM average means all available years
Mean annual minimum 14.1
Mean annual maximum 19.7

Cape Leeuwin aerial picture

average temperatures in cape leeuwin


Annual minimum temperature data 1910-2008

Annual maximum temperature data 1910-2008

Recent picture of weather recording station

Cape Leeuwin min/max temperature chart 1897-2008

Cape Leeuwin min/mean/max chart 1910-2010

BoM historic annual minima from 1897

BoM historic annual maxima from 1897

BoM/GISS/HadCRUT historic data comparison for Cape Leeuwin


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Cape Naturaliste (BoM station 9519)
(elevation 109m, nearest town Dunsborough 12km away with 2006 population around 3,371)

1911-1940 (30 years surveyed)
Average mean minimum 12.7
Average mean maximum 20.6

1921-1950 (30 years) / min 12.6 / max 20.3
1931-1960 (30 years) / min 12.5 / max 20.2
1941-1970 (30 years) / min 12.4 / max 20.2
1951-1980 (30 years) / min 12.5 / max 20.5
1961-1990 (30 years) / min 12.8 / max 20.8
1971-2000 (30 years) / min 13.0 / max 21.1

1981-2010 (30 years)
Average mean minimum 12.9
Average mean maximum 21.4

12 months December 2013 - November 2014
Mean annual minimum 13.5
Mean annual maximum 22.3

BoM average means all available years
Mean annual minimum 13.9
Mean annual maximum 20.6

Cape Naturaliste aerial picture

average temperatures in cape naturaliste


Annual minimum temperature data 1910-2008

Annual maximum temperature data 1910-2008

Cape Naturaliste min/mean/max chart 1910-2010

BoM historic annual minima from 1904

BoM historic annual maxima from 1904

BoM/GISS historic data comparison for Cape Naturaliste


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Carnarvon (BoM station 6011)
(town population 2006 - 5,283)

Pre-1900 vs recent 30 years mean temperature
1885-1899 (10 years surveyed) 72.2 F = 22.3 C
1981-2010 (30 years) Carnarvon Airport = 22.4 C

1891-1920 at Carnarvon Post Office
(elevation 5m, 29 years)
Average mean minimum 16.2
Average mean maximum 27.1

1921-1950 (30 years) / min 17.2 / max 26.8
1931-1950 (20 years) / min 17.4 / max 26.9
1941-1950 (10 years) / min 17.5 / max 26.8

Relocation to Carnarvon Airport
(elevation 4m, 2.4km distance)
1951-1980 (30 years) / min 17.1 / max 26.8
1961-1990 (30 years) / min 17.2 / max 27.2
1971-2000 (30 years) / min 17.3 / max 27.5

1981-2010 (30 years)
Average mean minimum 17.2
Average mean maximum 27.5

12 months December 2013 - November 2014
Mean annual minimum 17.8
Mean annual maximum 29.0

BoM average means all available years
Mean annual minimum 17.2
Mean annual maximum 27.2

average temperatures in carnarvon


Annual minimum temperature data 1910-2008

Annual maximum temperature data 1910-2008

Recent picture of weather recording station

Carnarvon min/max temperature chart 1887-1950

Carnarvon Airport min/mean/max chart 1910-2010

BoM historic annual minima 1885 to 1950

BoM historic annual minima from 1945

BoM historic annual maxima 1885 to 1950

BoM historic annual maxima from 1945

BoM/GISS/HadCRUT historic data comparison for Carnarvon


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Derby (BoM station 3032)
(shire population 2006 - 3,093)

Pre-1900 vs recent 30 years mean temperature
1888-1899 (10 years surveyed) 81.3 F = 27.4 C
1981-2010 (30 years) Derby Aero = 28 C

1891-1920 at Derby Post Office
(elevation 8m, 30 years)
Average mean minimum 21.3
Average mean maximum 33.6

1921-1950 (30 years) / min 21.8 / max 33.6
1931-1960 (30 years) / min 22.0 / max 33.8
1941-1970 (30 years) / min 21.8 / max 33.9
1951-1972 (21 years) / min 21.7 / max 34.1
1961-1990 (21 years) / min 21.5 / max 34.3
1971-2007 (17 years) / min 21.8 / max 34.5

Relocation to Derby Aero
(elevation 6m, 8.1km distance, 24 years)
1972-2000 (16 years) / min 21.7 / max 34.4
1981-2010 (30 years) / min 21.5 / max 34.6

12 months December 2013 - November 2014
Mean annual minimum 21.5
Mean annual maximum 35.2

BoM average means all available years
Mean annual minimum 21.6
Mean annual maximum 34.5

average temperatures in derby


Annual minimum temperature data 1910-2008

Annual maximum temperature data 1910-2008

Derby min/max temperature chart 1888-1997

Derby Aero min/mean/max chart 1910-2010

BoM historic annual minima 1888 to 1997

BoM historic annual minima from 1972

BoM historic annual maxima 1880 to 1997

BoM historic annual maxima from 1972

BoM/GISS historic data comparison for Derby


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Donnybrook (BoM station 9534)
(elevation 63m, town population 2006 - 1,933)

1901-1930 (29 years surveyed)
Average mean minimum 9.3
Average mean maximum 22.6

1921-1950 (30 years) / min 9.3 / max 23.0
1931-1960 (30 years) / min 9.3 / max 23.2
1941-1970 (30 years) / min 9.6 / max 23.2
1951-1980 (30 years) / min 9.8 / max 23.2
1961-1990 (28 years) / min 10.1 / max 23.2
1971-2000 (28 years) / min 10.1 / max 23.3

1981-2010 (30 years)
Average mean minimum 10.1
Average mean maximum 23.4

12 months December 2013 - November 2014
Mean annual minimum 11.3
Mean annual maximum 24.4

BoM average means all available years
Mean annual minimum 9.7
Mean annual maximum 23.1

average temperatures in donnybrook wa


Donnybrook aerial picture

BoM historic annual minima from 1902

BoM historic annual maxima from 1902

BoM/GISS historic data comparison for Donnybrook


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Esperance (BoM station 9789)
(town population 2006 - 14,450)

Pre-1900 vs recent 30 years mean temperature
1885-1899 (13 years surveyed) 61.5 F = 16.4 C
1981-2010 (30 years) Esperance = 17 C

1891-1920 at Esperance Post Office
(elevation 4m, 29 years)
Average mean minimum 11.3
Average mean maximum 21.2

1921-1950 (30 years) / min 11.4 / max 21.3
1931-1960 (30 years) / min 11.4 / max 21.3
1941-1969 (29 years) / min 11.5 / max 21.3
1951-1969 (19 years) / min 11.5 / max 21.3

Relocation to Esperance
(elevation 25m, 2.4km distance)
1971-2000 (30 years) / min 12.0 / max 21.8
1981-2010 (30 years) / min 12.1 / max 21.9

12 months December 2013 - November 2014
Mean annual minimum 12.9
Mean annual maximum 22.9

BoM average means all available years - Esperance
Mean annual minimum 12.5
Mean annual maximum 22.6

1981-2010 at Esperance Aero (BoM station 9542)
(elevation 142m, 19.2km distance, 17 years)
Average mean minimum 11.2
Average mean maximum 22

12 months December 2013 - November 2014
Mean annual minimum 11.7
Mean annual maximum 23.8

BoM average means all available years - Esperance Aero
Mean annual minimum 11.4
Mean annual maximum 22.7

average temperatures in esperance wa







Annual minimum temperature data 1910-2008

Annual maximum temperature data 1910-2008

Recent picture of weather recording station

Esperance min/max temperature chart 1885-1968

Esperance min/mean/max chart 1910-2010

BoM historic annual minima 1883 to 1969

BoM historic annual minima from 1969

BoM historic annual maxima 1883 to 1969

BoM historic annual maxima from 1969

BoM/GISS/HadCRUT historic data comparison for Esperance


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Eucla (BoM station 11003)
(elevation 93m, town population 2006 - 50)

1926-1940 (13 years surveyed)
Average mean minimum 12.1
Average mean maximum 22.2

1926-1950 (21 years) / min 12.1 / max 21.9
1931-1960 (27 years) / min 11.8 / max 21.7
1941-1970 (25 years) / min 11.9 / max 21.9
1951-1980 (26 years) / min 11.9 / max 22.3
1961-1990 (25 years) / min 12.0 / max 22.8
1971-2000 (26 years) / min 12.1 / max 23.0

1981-2010 (30 years)
Average mean minimum 12.2
Average mean maximum 23.2

12 months December 2013 - November 2014
Mean annual minimum 12.9
Mean annual maximum 24.2

BoM average means all available years
Mean annual minimum 12
Mean annual maximum 22.5

average temperatures in eucla


Eucla aerial picture

BoM historic annual minima from 1926

BoM historic annual maxima from 1926

BoM/GISS/HadCRUT historic data comparison for Eucla


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Eyre (BoM station 11019)
(elevation 6m, population 2006 - 50)

1899-1920 (22 years surveyed)
Average mean minimum 11.0
Average mean maximum 22.4

1983-2000 (13 years) / min 10.8 / max 22.9
1981-2010 (30 years) / min 10.5 / max 23.3

12 months December 2013 - November 2014
Mean annual minimum 10.7
Mean annual maximum 24.5

BoM average means all available years
Mean annual minimum 10.4
Mean annual maximum 22.8

Eyre min/max temperature chart 1899-2008

BoM historic annual minima from 1899

BoM historic annual maxima from 1899

BoM/GISS historic data comparison for Eyre

average temperatures in eyre western australia


BoM historic annual maxima from 1899

BoM/GISS historic data comparison for Eyre

Eyre aerial picture


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Geraldton (BoM station 8051)
(city population 2006 - 31,553)

Pre-1900 vs recent 30 years mean temperature
1880-1899 (17 years surveyed) 66.5 F = 19.2 C
1981-2010 (30 years) Geraldton Airport = 19.9 C

1881-1910 at Geraldton Town
(elevation 3m, 29 years)
Average mean minimum 13.9
Average mean maximum 24.6

1921-1950 (30 years) / min 14.8 / max 24.8
1931-1953 (22 years) / min 14.7 / max 24.8
1941-1953 (12 years) / min 14.5 / max 24.8

Relocation to Geraldton Airport
(elevation 33m, 9.2km distance)
1941-1970 (28 years) / min 13.5 / max 25.6
1951-1980 (30 years) / min 13.5 / max 25.7
1961-1990 (30 years) / min 13.6 / max 25.9
1971-2000 (30 years) / min 13.7 / max 26.0

1981-2010 (30 years)
Average mean minimum 13.7
Average mean maximum 26.1

12 months December 2013 - November 2014
Mean annual minimum 14.1
Mean annual maximum 27.4

BoM average means all available years
Mean annual minimum 13.6
Mean annual maximum 25.9

average temperatures in geraldton


Annual minimum temperature data 1910-2008

Annual maximum temperature data 1910-2008

Recent picture of weather recording station

Geraldton min/max temperature chart 1880-1953

Geraldton Airport min/mean/max chart 1910-2010

BoM historic annual minima 1880 to 1953

BoM historic annual minima from 1941

BoM historic annual maxima 1880 to 1953

BoM historic annual maxima from 1941

BoM/GISS/HadCRUT historic data comparison for Geraldton


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Halls Creek (BoM station 2012)
(shire population 2006 - 3,714)

1898-1920 at Old Halls Creek
(elevation 360m, 23 years surveyed)
Average mean minimum 17.8
Average mean maximum 33.5

1921-1950 (30 years) / min 17.8 / max 33.3
1931-1952 (21 years) / min 18.0 / max 33.5
1941-1969 (14 years) / min 18.0 / max 33.4

Relocation to Halls Creek Airport
(elevation 422m, 12.7km distance)
1951-1980 (30 years) / min 19.9 / max 33.6
1961-1990 (30 years) / min 20.0 / max 33.5
1971-2000 (30 years) / min 20.2 / max 33.5

1981-2010 (30 years)
Average mean minimum 20.3
Average mean maximum 33.6

12 months December 2013 - November 2014
Mean annual minimum 19.8
Mean annual maximum 33.4

BoM average means all available years
Mean annual minimum 20
Mean annual maximum 33.6

Annual minimum temperature data 1910-2008

Annual maximum temperature data 1910-2008

average temperatures in halls creek



Recent picture of weather recording station

Old Halls Creek min/max temperature chart 1898-1951

Halls Creek Airport min/mean/max chart 1910-2010

BoM historic annual minima 1898 to 1969

BoM historic annual minima from 1944

BoM historic annual maxima 1898 to 1969

BoM historic annual maxima from 1944

BoM/GISS/HadCRUT historic data comparison for Halls Creek


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Kalgoorlie (BoM station 12038)
(shire population 2006 - 28,242)

Pre-1900 vs recent 30 years mean temperature
1897-1899 (3 years surveyed) 65.9 F = 18.8 C
1981-2010 (30 years) Kalgoorlie-Boulder Airport = 18.7 C

1901-1930 at Kalgoorlie Post Office
(elevation 361m, 30 years)
Average mean minimum 12.0
Average mean maximum 25.8

1921-1950 (30 years) / min 12.2 / max 25.7
1931-1953 (23 years) / min 12.2 / max 25.4
1941-1953 (13 years) / min 12.2 / max 25.2

Relocation to Kalgoorlie/Boulder Airport
(elevation 365m, 4km distance)
1942-1970 (29 years) / min 11.2 / max 25.1
1951-1980 (30 years) / min 11.5 / max 25.1
1961-1990 (30 years) / min 11.7 / max 25.2
1971-2000 (30 years) / min 11.8 / max 25.2

1981-2010 (30 years)
Average mean minimum 12
Average mean maximum 25.4

12 months December 2013 - November 2014
Mean annual minimum 12.7
Mean annual maximum 26.1

BoM average means all available years
Mean annual minimum 11.7
Mean annual maximum 25.2

average temperatures in kalgoorlie


Recent picture of Kalgoorlie-Boulder Airport recording station

Annual minimum temperature data 1910-2008

Annual maximum temperature data 1910-2008

Kalgoorlie Post Office min/max temperature chart 1897-1952

Kalgoorlie Airport min/mean/max chart 1910-2010

BoM historic annual minima 1897 to 1953

BoM historic annual minima from 1939

BoM historic annual maxima 1897 to 1953

BoM historic annual maxima from 1939

BoM/GISS/HadCRUT historic data comparison for Kalgoorlie


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Katanning (BoM station 10916)
(elevation 310m, shire population 2006 - 3,808)

Pre-1900 vs recent 30 years mean temperature
1894-1899 (5 years surveyed) 59.8 F = 15.4 C
1981-2010 (30 years) = 15.9 C

1894-1920 (26 years)
Average mean minimum 9.0
Average mean maximum 22.1

1921-1950 (30 years) / min 9.3 / max 22.0
1931-1960 (30 years) / min 9.4 / max 22.0
1941-1970 (30 years) / min 9.4 / max 22.0
1951-1980 (30 years) / min 9.5 / max 22.0
1961-1990 (30 years) / min 9.6 / max 22.1
1971-2000 (30 years) / min 9.6 / max 22.2

1999-2010 (12 years)
Average mean minimum 9.4
Average mean maximum 22.4

12 months December 2013 - November 2014
Mean annual minimum 10.0
Mean annual maximum 23.1

BoM average means all available years
Mean annual minimum 9.5
Mean annual maximum 22.4

Annual minimum temperature data 1910-2008

Annual maximum temperature data 1910-2008

average temperatures in katanning western australia




Katanning aerial picture

Katanning min/max temperature chart 1894-2008

Katanning min/mean/max chart 1910-2010

BoM historic annual minima from 1894

BoM historic annual maxima from 1894

BoM/GISS historic data comparison for Katanning


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Kellerberrin (BoM station 10073)
(elevation 250m, shire population 2006 - 866)

1911-1930 (21 years surveyed)
Average mean minimum 10.5
Average mean maximum 25.1

1921-1950 (30 years) / min 10.8 / max 25.2
1931-1960 (30 years) / min 10.9 / max 25.0
1941-1970 (30 years) / min 11.1 / max 24.8
1951-1980 (30 years) / min 11.2 / max 24.9
1961-1990 (27 years) / min 11.2 / max 25.0
1971-2000 (28 years) / min 11.1 / max 25.1

1981-2010 (27 years)
Average mean minimum 10.5
Average mean maximum 25.4

12 months December 2013 - November 2014
Mean annual minimum 11.1
Mean annual maximum 26.9

BoM average means all available years
Mean annual minimum 10.8
Mean annual maximum 25.1

Annual minimum temperature data 1910-2008

Annual maximum temperature data 1910-2008

average temperatures in kellerberrin wa


Kellerberrin aerial picture

Kellerberrin min/mean/max chart 1910-2010

BoM historic annual minima from 1910

BoM historic annual maxima from 1910

BoM/GISS historic data comparison for Kellerberrin

kenskingdom analysis of HQ vs raw BoM data history including Kellerberrin


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Laverton (BoM station 12305)
(shire population 2006 - 316)

1901-1930 at Laverton
(elevation 461m, 30 years surveyed)
Average mean minimum 13.2
Average mean maximum 27.3

1921-1950 (30 years) / min 13.2 / max 27.5
1931-1960 (28 years) / min 13.1 / max 27.4
1941-1969 (27 years) / min 13.2 / max 27.3
1951-1971 (18 years) / min 13.3 / max 27.3

1991-2010 at Laverton Aero
(elevation 464m, 2.5km distance, 19 years)
Average mean minimum 13.9
Average mean maximum 26.8

12 months December 2013 - November 2014
Mean annual minimum 14.2
Mean annual maximum 27.9

BoM average means all available years
Mean annual minimum 13.7
Mean annual maximum 26.7

average temperatures in laverton wa


BoM historic annual minima 1900 to 1971

BoM historic annual minima from 1991

BoM historic annual maxima 1900 to 1971

BoM historic annual maxima from 1991


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Marble Bar (BoM station 4106)
(elevation 182m, shire population 2006 - 194)
Historically the hottest town in Australia, possibly the world

1901-1930 (30 years surveyed)
Average mean minimum 19.7
Average mean maximum 35.6

1921-1950 (30 years) / min 19.6 / max 35.5
1931-1960 (30 years) / min 19.7 / max 35.4
1941-1970 (30 years) / min 19.6 / max 35.2
1951-1980 (30 years) / min 19.9 / max 35.1
1961-1990 (30 years) / min 20.1 / max 35.0
1971-2000 (30 years) / min 20.4 / max 35.1

1981-2006 (26 years)
Average mean minimum 20.4
Average mean maximum 35.3

12 months December 2013 - November 2014
Mean annual minimum 19.8
Mean annual maximum 36.0

Note: these 2010/11 calculations exclude February 2011 for Marble Bar, which the Bureau of Meteorology reports had no data available for the month.

BoM average mean minimum all available years
BoM average mean maximum all available years
Mean annual minimum 19.9
Mean annual maximum 35.3

average temperatures in marble bar



Marble Bar aerial picture

Annual minimum temperature data 1910-2008

Annual maximum temperature data 1910-2008

Marble Bar min/mean/max chart 1910-2004

BoM historic annual minima from 2000

BoM historic annual maxima from 2000

BoM/GISS historic data comparison for Marble Bar


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Merredin (BoM station 10092)
(shire population 2006 - 2,550)

1912-1940 at Merredin Research Station
(elevation 318m, 28 years surveyed)
Average mean minimum 10.3
Average mean maximum 24.6

1921-1950 (30 years) / min 10.6 / max 24.7
1931-1960 (30 years) / min 10.6 / max 24.8
1941-1970 (30 years) / min 10.7 / max 24.7
1951-1980 (30 years) / min 11.0 / max 24.7
1961-1985 (24 years) / min 11.2 / max 24.8
1971-1985 (14 years) / min 11.4 / max 24.9

Relocation to Merredin
(elevation 315m, 5.8km distance)
1971-2000 (30 years) / min 11.4 / max 24.8
1981-2010 (30 years) / min 11.4 / max 25.1

12 months December 2013 - November 2014
Mean annual minimum 12.6
Mean annual maximum 26.8

BoM average means all available years
Mean annual minimum 11.4
Mean annual maximum 24.9

Annual minimum temperature data 1910-2008

Annual maximum temperature data 1910-2008

average temperatures in merredin




Merredin min/mean/max chart 1913-2008

BoM historic annual minima 1912 to 1985

BoM historic annual minima from 1966

BoM historic annual maxima 1912 to 1985

BoM historic annual maxima from 1966

BoM/GISS historic data comparison for Merredin


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Mt Barker (BoM station 9581)
(elevation 300m, shire population 2006 - 2,971)

1905-1920 (16 years surveyed)
Average mean minimum 8.9
Average mean maximum 19.9

1921-1950 (30 years) / min 9.1 / max 19.8
1931-1960 (30 years) / min 9.1 / max 20.0
1941-1970 (30 years) / min 9.3 / max 20.3
1951-1975 (25 years) / min 9.5 / max 20.4
1961-1989 (17 years) / min 9.8 / max 20.6
1971-2000 (17 years) / min 10.1 / max 20.3

1981-2010 (22 years)
Average mean minimum 10.1
Average mean maximum 20.4

12 months December 2013 - November 2014
Mean annual minimum 10.6
Mean annual maximum 21.7

BoM average means all available years
Mean annual minimum 9.4
Mean annual maximum 20.1

average temperatures in mt barker wa


Mt Barker aerial picture

BoM historic annual minima from 1905

BoM historic annual maxima from 1905


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Northam (BoM station 10111)
(elevation 170m, shire population 2006 - 6,009)

1902-1920 (19 years surveyed)
Average mean minimum 10.7
Average mean maximum 25.0

1921-1950 (30 years) / min 11.1 / max 25.1
1931-1960 (30 years) / min 10.9 / max 25.3
1941-1970 (30 years) / min 11.0 / max 25.3
1951-1980 (29 years) / min 10.9 / max 25.3
1961-1990 (28 years) / min 11.2 / max 25.4
1971-2000 (28 years) / min 11.2 / max 25.5

1981-2010 (29 years)
Average mean minimum 10.8
Average mean maximum 25.7

12 months December 2013 - November 2014
Mean annual minimum 11.7
Mean annual maximum 26.4

BoM average means all available years
Mean annual minimum 10.9
Mean annual maximum 25.3

average temperatures in northam wa



Northam aerial picture

BoM historic annual minima from 1902

BoM historic annual maxima from 1902


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Onslow (BoM station 5017)
(elevation 4m, town population 2006 - 573)

Pre-1900 vs recent 30 years mean temperature
1887-1899 (11 years surveyed) 75.4 F = 24.1 C
1971-2000 (27 years) / Average mean temperature 25.1 C

1891-1920 (30 years)
Average mean minimum 17.0
Average mean maximum 31.6

1921-1950 (30 years) / min 17.6 / max 31.3
1931-1960 (30 years) / min 17.9 / max 31.2
1941-1970 (29 years) / min 18.1 / max 31.2
1951-1980 (26 years) / min 18.4 / max 31.1
1961-1990 (26 years) / min 18.7 / max 31.2
1971-2000 (27 years) / min 19.2 / max 31.1

1981-2010 (30 years)
Average mean minimum 19.4
Average mean maximum 31.2

12 months December 2013 - November 2014
Mean annual minimum 20.3
Mean annual maximum 33.0

BoM average means all available years
Mean annual minimum 18.9
Mean annual maximum 31.3

average temperatures in onslow western australia




Onslow aerial picture

Onslow min/max temperature chart 1887-2008

BoM historic annual minima from 1887

BoM historic annual maxima from 1887


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Perth (BoM station 9225)
(capital city population 2009 - 1.65 million / population history)

Pre-1900 vs recent 30 years mean temperature
1876-1899 (24 years surveyed) 64.9 F = 18.3 C
1981-2010 (30 years) Perth Airport = 18.6 C

Pre-1900 vs latest minimum temperature
1876-1899 (24 years) 54.2 F = 12.3 C
1981-2010 (30 years) Perth Airport = 12.4 C

Pre-1900 vs latest maximum temperature
1876-1899 (24 years) 75.6 F = 24.2 C
1981-2010 (30 years) Perth Airport = 24.8 C
(Perth Airport elevation 15m)

1897-1910 at Perth Regional
(elevation 19m, 14 years)
Average mean minimum 12.8
Average mean maximum 22.8

1921-1950 (30 years) / min 13.0 / max 23.2
1931-1960 (30 years) / min 13.0 / max 23.3
1941-1970 (30 years) / min 13.1 / max 23.3
1951-1980 (30 years) / min 13.5 / max 23.6
1961-1990 (30 years) / min 14.0 / max 23.9
1971-1992 (21 years) / min 14.2 / max 24.1

Relocation to Perth Metro
(elevation 25m, 4km distance)

1994-2009 (16 years)
Average mean minimum 12.6
Average mean maximum 24.5

12 months December 2013 - November 2014
Mean annual minimum 13.6
Mean annual maximum 25.5

BoM average means all available years
Mean annual minimum 12.7
Mean annual maximum 24.6

average temperatures in perth western australia


Annual minimum temperature data 1910-2008

Annual maximum temperature data 1910-2008

Perth Gardens min/max temperature chart 1876-1929

Perth Airport min/mean/max chart 1910-2010

BoM historic annual minima 1876 to 1930

BoM historic annual minima 1897 to 1992

BoM historic annual minima from 1994

BoM historic annual maxima 1876 to 1930

BoM historic annual maxima 1897 to 1992

BoM historic annual maxima from 1994

BoM/GISS/HadCRUT historic data comparison for Perth

Changes in location affecting Perth temperature history

See 2012 thermal night scan of Perth CBD showing up to 4C
concrete and bitumen heat retention compared to residential areas

Further quality information at Perth Weather Centre


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Rottnest Island (BoM station 9193)
(population 2006 - about 300)

Pre-1900 vs recent 30 years mean temperature
1876-1899 (11 years surveyed) 63.9 F = 17.7 C
1981-2010 (30 years) Rottnest Island = 18.8 C

1882-1910 at Rottnest Island Lighthouse
(elevation 46m, 22 years)
Average mean minimum 14.0
Average mean maximum 21.6

1921-1950 (29 years) / min 15.1 / max 21.5
1931-1956 (25 years) / min 15.0 / max 21.6
1941-1970 (21 years) / min 14.9 / max 21.5
1951-1980 (22 years) / min 15.0 / max 21.5
1965-1990 (25 years) / min 15.2 / max 21.6
1971-1995 (24 years) / min 15.3 / max 21.7

Relocation to Rottnest Island
(elevation 43m, .2km distance)

1983-2010 (21 years)
Average mean minimum 15.6
Average mean maximum 22.1

12 months December 2013 - November 2014
Mean annual minimum 16.3
Mean annual maximum 22.8

BoM average means all available years
Mean annual minimum 15.6
Mean annual maximum 22.1

Recent picture of weather recording station

average temperatures on rottnest island



Annual minimum temperature data 1910-2008

Annual maximum temperature data 1910-2008

Rottnest Lighthouse min/max temperature chart 1880-1995

Rottnest Island min/mean/max chart 1910-2010

BoM historic annual minima 1880 to 1995

BoM historic annual minima from 1983

BoM historic annual maxima 1880 to 1995

BoM historic annual maxima from 1983

BoM/GISS historic data comparison for Rottnest Island


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Southern Cross (BoM station 12320)
(elevation 355m, town population 2006 - 708)

Pre-1900 vs recent 30 years mean temperature
1895-1899 (4 years surveyed) 64.6 F = 18.1 C
1981-2010 (26 years) = 18.2 C

1895-1920 (25 years)
Average mean minimum 10.3
Average mean maximum 25.8

1921-1950 (30 years) / min 10.4 / max 25.7
1931-1960 (30 years) / min 10.6 / max 25.5
1941-1970 (30 years) / min 10.6 / max 25.6
1951-1980 (30 years) / min 10.7 / max 25.5
1961-1990 (30 years) / min 10.9 / max 25.3
1971-2000 (30 years) / min 11.2 / max 25.1
1981-2007 (27 years) / min 11.3 / max 25.2

Relocation to Southern Cross Airfield
(elevation 347m, 2.7km distance)
1996-2010 (14 years) / min 10.1 / max 25.8

12 months December 2013 - November 2014
Mean annual minimum 11.7
Mean annual maximum 26.6

BoM average means all available years
Mean annual minimum 11.1
Mean annual maximum 25.4

Annual minimum temperature data 1910-2008

Annual maximum temperature data 1910-2008

Southern Cross aerial picture

average temperatures in southern cross



Street view picture of Southern Cross recording station

Southern Cross min/max temperature chart 1895-2006

Southern Cross min/mean/max chart 1910-2006

BoM historic annual minima 1895 to 2007

BoM historic annual minima from 1996

BoM historic annual maxima 1895 to 2007

BoM historic annual maxima from 1996

BoM/GISS historic data comparison for Southern Cross


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Wandering (BoM station 10917)
(elevation 280m, shire population 2006 - 355)

1901-1920 (19 years surveyed)
Average mean minimum 8.0
Average mean maximum 22.9

1921-1950 (30 years) / min 8.3 / max 22.8
1931-1960 (30 years) / min 8.1 / max 22.9
1941-1970 (30 years) / min 8.2 / max 22.9
1951-1980 (30 years) / min 8.4 / max 23.1
1961-1990 (27 years) / min 8.7 / max 23.2
1971-2000 (27 years) / min 9.0 / max 23.5
1981-2003 (19 years) / min 9.1 / max 23.4

Relocation to Wandering
(elevation 275m, 1.1km distance)

1998-2010 (12 years) / min 8.3 / max 23.7

12 months December 2013 - November 2014
Mean annual minimum 9.2
Mean annual maximum 24.4

BoM average means all available years
Mean annual minimum 8.4
Mean annual maximum 23.7

Annual minimum temperature data 1910-2008

Annual maximum temperature data 1910-2008

Wandering aerial picture

average temperatures in wandering western australia



Recent picture of weather recording station

Wandering min/mean/max chart 1910-2010

BoM historic annual minima 1901 to 2003

BoM historic annual minima from 1998

BoM historic annual maxima 1901 to 2003

BoM historic annual maxima from 1998

BoM/GISS historic data comparison for Wandering


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Wiluna (BoM station 13012)
(elevation 521m, shire population 2006 - 681)

1901-1930 (28 years surveyed)
Average mean minimum 14.0
Average mean maximum 28.8

1921-1950 (29 years) / min 14.1 / max 29.1
1931-1960 (30 years) / min 13.9 / max 29.0
1941-1970 (29 years) / min 13.9 / max 29.1
1951-1980 (29 years) / min 14.2 / max 29.1
1961-1990 (29 years) / min 14.7 / max 29.3
1971-2000 (29 years) / min 14.9 / max 29.3

1981-2010 (29 years)
Average mean minimum 14.8
Average mean maximum 29.6

12 months December 2013 - November 2014
Mean annual minimum 15.2
Mean annual maximum 30.5

BoM average means all available years
Mean annual minimum 14.3
Mean annual maximum 29.2

average temperatures in wiluna wa



Wiluna aerial picture

BoM historic annual minima from 1901

BoM historic annual maxima from 1901


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Wyndham (BoM station 1013)
(shire population 2006 - 770)

Pre-1900 vs recent 30 years mean temperature
1889-1899 (7 years surveyed) 85.4 F = 29.7 C
1968-2008 (40 years) = 29.4 C

1898-1920 at Wyndham Port
(elevation 20m, 23 years)
Average mean minimum 24.2
Average mean maximum 34.1

1921-1950 (30 years) / min 24.2 / max 34.4
1931-1960 (30 years) / min 24.3 / max 35.1
1941-1962 (27 years) / min 24.1 / max 35.6
1951-1967 (17 years) / min 24.2 / max 35.8

Relocation to Wyndham
(elevation 11m, 3.6km distance)
1971-2000 (30 years) / min 23.4 / max 35.7

1981-2010 (30 years)
Average mean minimum 23.3
Average mean maximum 35.7

12 months December 2013 - November 2014
Mean annual minimum 22.5
Mean annual maximum 35.4

BoM average means all available years
Mean annual minimum 23.2
Mean annual maximum 35.6

average temperatures in wyndham




Wyndham min/max temperature chart 1898-1967

BoM historic annual minima 1898 to 1967

BoM historic annual minima from 1968

BoM historic annual maxima 1898 to 1967

BoM historic annual maxima from 1968


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York (BoM station 10311)
(shire population 2006 - 3,484)

Pre-1900 vs recent 30 years mean temperature
1880-1899 (18 years surveyed) 63.6 F = 17.6 C
1981-2010 (27 years) York = 17.4 C

1881-1910 at York Post Office
(elevation 174m, 28 years)
Average mean minimum 10.5
Average mean maximum 24.3

1921-1950 (30 years) / min 10.4 / max 24.8
1931-1960 (30 years) / min 10.4 / max 24.8
1941-1970 (30 years) / min 10.5 / max 24.9
1951-1980 (29 years) / min 10.4 / max 25.0
1961-1990 (29 years) / min 10.5 / max 25.0
1971-1996 (24 years) / min 10.6 / max 25.2

Relocation to York
(elevation 179m, 1.9km distance)

1996-2010 (16 years)
Average mean minimum 9.5
Average mean maximum 25.4

12 months December 2013 - November 2014
Mean annual minimum 10.1
Mean annual maximum 26.5

BoM average means all available years
Mean annual minimum 9.5
Mean annual maximum 25.4

Annual minimum temperature data 1910-2008

Annual maximum temperature data 1910-2008

average temperatures in york western australia





York Post Office min/max temperature chart 1880-1995

York min/mean/max chart 1910-2010

BoM historic annual minima 1880 to 1996

BoM historic annual minima from 1996

BoM historic annual maxima 1880 to 1996

BoM historic annual maxima from 1996

BoM/GISS historic data comparison for York

See the history of a weather station in Western Australia


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