Australian climate stable since 2012Dataset shows no warming for 13 years and six months Comparing the first and second halves of the time period from May 2012 to October 2025, Australia's temperature anomalies have effectively plateaued with slight cooling of 0.003C according to the Australian Climate Observation Reference Network (ACORN 2.5) for land stations (Bureau of Meteorology data source). The University of Alabama Huntsville satellite dataset for Australian lower troposphere anomalies (UAH 6.1) shows mean temperature warming of 0.260C when comparing the first and second halves of the period from May 2012 to October 2025 (with significant warming over Australia since 2021 as a result of UAH methodology being changed in November 2024). In a different timeframe from January 2013 to October 2025, ACORN also shows mean temperature cooling of 0.092C and UAH shows Australian lower troposphere warming of 0.220C when averaging the first and second halves of this time period. The ACORN dataset shows significant land surface warming since June 2023 and the UAH dataset shows significant warming of the lower troposphere since July 2023 - both potentially affected by the emergence of an El Nino in the Pacific Ocean, strong solar activity and abnormally high atmospheric moisture content due to the Hunga Tonga underwater volcanic eruption in December 2021. Comparing 2012/13-2018/19 with 2019/20-2024/25, ACORN data show the trends are seasonal. Averaged mean temperature anomalies in Australia's cool months of April-October warmed slightly (+0.08C) and the hot months of October-April cooled significantly (-0.21C). Australia's climate became more moderate during these 12 years. The charts below are updated each month to track anomaly trends produced by the ACORN and UAH datasets.
The chart below tracks anomaly trends within ACORN 2.5 maximum temperatures.
The chart below tracks anomaly trends within ACORN 2.5 minimum temperatures.
It is worth noting the ACORN 2.5 mean, minimum and maximum temperature anomaly averages in Australia's seven state and territory jurisdictions: NSW/ACT mean : May 2012-Jan 2019 - 1.342C / Feb 2019-Oct 2025 - 1.023C (-0.319C) NSW/ACT minimum : May 2012-Jan 2019 - 1.032C / Feb 2019-Oct 2025 - 0.949C (-0.082C) NSW/ACT maximum : May 2012-Jan 2019 - 1.647C / Feb 2019-Oct 2025 - 1.090C (-0.557C) Northern Territory : May 2012-Jan 2019 - 0.795C / Feb 2019-Oct 2025 - 0.892C (+0.096C) Northern Territory minimum : May 2012-Jan 2019 - 0.519C / Feb 2019-Oct 2025 - 0.785C (+0.266C) Northern Territory maximum : May 2012-Jan 2019 - 1.066C / Feb 2019-Oct 2025 - 0.993C (-0.073C) Queensland : May 2012-Jan 2019 - 1.296C / Feb 2019-Oct 2025 - 1.189C (-0.107C) Queensland minimum : May 2012-Jan 2019 - 1.240C / Feb 2019-Oct 2025 - 1.293C (+0.053C) Queensland maximum : May 2012-Jan 2019 - 1.347C / Feb 2019-Oct 2025 - 1.080C (-0.267C) South Australia : May 2012-Jan 2019 - 1.179C / Feb 2019-Oct 2025 - 0.952C (-0.227C) South Australia minimum : May 2012-Jan 2019 - 0.809C / Feb 2019-Oct 2025 - 0.638C (-0.170C) South Australia maximum : May 2012-Jan 2019 - 1.544C / Feb 2019-Oct 2025 - 1.259C (-0.285C) Tasmania : May 2012-Jan 2019 - 0.620C / Feb 2019-Oct 2025 - 0.468C (-0.151C) Tasmania minimum : May 2012-Jan 2019 - 0.498C / Feb 2019-Oct 2025 - 0.406C (-0.092C) Tasmania maximum : May 2012-Jan 2019 - 0.737C / Feb 2019-Oct 2025 - 0.523C (-0.213C) Victoria : May 2012-Jan 2019 - 1.003C / Feb 2019-Oct 2025 - 0.687C (-0.316C) Victoria minimum : May 2012-Jan 2019 - 0.807C / Feb 2019-Oct 2025 - 0.654C (-0.153C) Victoria maximum : May 2012-Jan 2019 - 1.192C / Feb 2019-Oct 2025 - 0.713C (-0.479C) Western Australia : May 2012-Jan 2019 - 0.861C / Feb 2019-Oct 2025 - 1.102C (+0.240C) Western Australia minimum : May 2012-Jan 2019 - 0.503C / Feb 2019-Oct 2025 - 0.738C (+0.234C) Western Australia maximum : May 2012-Jan 2019 - 1.214C / Feb 2019-Oct 2025 - 1.462C (+0.248C) The cumulative mean temperature average of these jurisdictional anomalies equals -0.112C when comparing May 2012-Jan 2019 with Feb 2019-Oct 2025, mean temperature warming only apparent in the Northern Territory and Western Australia. The cumulative minimum temperature average of these jurisdictional anomalies equals +0.008C when comparing May 2012-Jan 2019 with Feb 2019-Oct 2025. The cumulative maximum temperature average of these jurisdictional anomalies equals -0.232C when comparing May 2012-Jan 2019 with Feb 2019-Oct 2025. The chart below tracks monthly anomaly trends within the US National Oceanic and Atmospheric Administration mean temperatures (1910-2000 mean baseline) for the Oceania region (comprising Australia, Papua New Guinea, New Zealand, Fiji, Solomon Islands, Federated States Of Micronesia, Vanuatu, Samoa, Kiribati, Tonga, Marshall Islands, Palau, Tuvalu and Nauru).
The trends above from different datasets are worth monitoring as most Australian public policy hostile to fossil fuels and targetted at renewable energy is now based on the inaccurate premise that Australia's climate is warming rapidly, according to the official ACORN 2.5 monthly temperature anomalies published by the Bureau of Meteorology. Note : ACORN and UAH data above are updated usually on the third or fourth day of each month, while NOAA anomalies for Oceania are usually updated in the middle of each month (note that NOAA data is currently only available since August 2025 due to the US government shutdown).
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