Cunnamulla Post Office is a weather station located 189 m above sea level, 1 km from Cunnamulla. Its records go back to 1888: 58 years of temperature are available up to 2025, along with rainfall and a comparison with two reference normals. Over 1991–2020 the annual mean temperature there is 22.0 °C, clearly higher than over 1961–1990 (21.2 °C): a difference of 0.7 °C. The warmest year of the series is 2005 (23.2 °C) and the coldest 1964 (20.4 °C). The last complete year, 2020, ranks 14 out of 58, from warmest to coldest. Over 1961–2025, the annual mean temperature changes by +0.26 °C per decade. The station ranks 41 out of 227 stations, from the fastest rise to the slowest.
Annual mean temperature since 1888
The first ten years of the series (1957–1966) average 21.1 °C; the last ten (2011–2020) average 22.5 °C, a difference of +1.4 °C. Of the ten warmest years in the series, 9 fall after 1999. The warmest is 2005 (23.2 °C). The ten-year running mean peaks at 22.5 °C (2020) and bottoms out at 21.0 °C (1971).
Annual rainfall since 1888
On average 365 mm of rain falls per year over the 136 documented years. The wettest year, 1956, received 924 mm; the driest, 2002, only 123 mm, which is 7.5 times less. The 1991–2020 normal (377 mm per year) is 12 mm (3.1 %) below the 1961–1990 one (389 mm). Over 1991–2020, January is on average the wettest month (61 mm) and August the driest (14 mm). Between 2004 and 2025, 10 years out of 20 exceeded the series average.
Monthly normals: 1961–1990 against 1991–2020
The table compares, month by month, the mean temperature and the rainfall total of two thirty-year reference periods. The difference column shows what the recent period changes compared with the earlier one.
| Month | Temp. 1961–1990 | Temp. 1991–2020 | Difference | Rain 1961–1990 | Rain 1991–2020 | Difference |
|---|---|---|---|---|---|---|
| January | 28.9 °C | 30.3 °C | +1.4 °C | 64 mm | 61 mm | −3 mm |
| February | 28.5 °C | 28.9 °C | +0.4 °C | 34 mm | 50 mm | +16 mm |
| March | 26.0 °C | 26.4 °C | +0.4 °C | 49 mm | 38 mm | −11 mm |
| April | 21.4 °C | 21.9 °C | +0.5 °C | 37 mm | 21 mm | −16 mm |
| May | 16.6 °C | 17.0 °C | +0.4 °C | 35 mm | 28 mm | −7 mm |
| June | 13.2 °C | 13.7 °C | +0.5 °C | 18 mm | 25 mm | +7 mm |
| July | 12.1 °C | 13.1 °C | +1.0 °C | 25 mm | 18 mm | −7 mm |
| August | 14.2 °C | 15.0 °C | +0.8 °C | 22 mm | 14 mm | −8 mm |
| September | 18.1 °C | 19.3 °C | +1.2 °C | 18 mm | 14 mm | −4 mm |
| October | 22.4 °C | 23.1 °C | +0.7 °C | 24 mm | 24 mm | 0 mm |
| November | 25.3 °C | 26.2 °C | +0.9 °C | 26 mm | 42 mm | +16 mm |
| December | 28.0 °C | 28.7 °C | +0.7 °C | 37 mm | 42 mm | +5 mm |
The largest temperature change is in January (+1.4 °C) and the smallest in February (+0.4 °C); over the year the mean difference is +0.7 °C, and 12 months out of twelve are warmer than before. For rainfall, the largest difference is in February (+16 mm) and the smallest in April (−16 mm).
Records at Cunnamulla Post Office
- Warmest year: 23.2 °C, in 2005
- Coldest year: 20.4 °C, in 1964
- Driest year: 123 mm, in 2002
- Wettest year: 924 mm, in 1956
- Warmest month: 34.9 °C, in January 2019
- Coldest month: 10.1 °C, in June 2007
- Wettest month: 459 mm, in April 1990
- Hottest day: 47.2 °C, on 3 January 2014
- Coldest day: −2.2 °C, on 26 July 1968
- Heaviest rain in one day: 168.0 mm, on 8 January 2024
2.8 °C separate the warmest year of the series from the coldest. Between the hottest and the coldest day on record, the range reaches 49.4 °C.
Temperature trend over 1961–2025
The regression line of annual mean temperature changes by +0.26 °C per decade between 1961 and 2025, about +1.7 °C over the whole period. That is faster than the median of the 227 stations (+0.19 °C per decade), by 0.07 °C per decade: the station ranks 41 out of 227.
The last 24 months against the 1991–2020 normal
Over the last 23 months (October 2024 to September 2026), 16 months out of 20 were warmer than the 1991–2020 normal for the same month; the mean departure is +1.1 °C. The highest departure was in October 2025 (+3.3 °C); the lowest, in August 2025 (−0.7 °C). The last twelve months add up to 439 mm of rain, which is 116 % of the 1991–2020 annual normal (377 mm).
| Month | Temperature | Departure from normal | Rain | Normal rain |
|---|---|---|---|---|
| October 2024 | 25.4 °C | +2.3 °C | – | 24 mm |
| November 2024 | 29.1 °C | +2.9 °C | – | 42 mm |
| January 2025 | 31.9 °C | +1.6 °C | 9 mm | 61 mm |
| February 2025 | 30.2 °C | +1.3 °C | 23 mm | 50 mm |
| March 2025 | – | – | 202 mm | 38 mm |
| April 2025 | 21.7 °C | −0.2 °C | 35 mm | 21 mm |
| May 2025 | 17.3 °C | +0.3 °C | 62 mm | 28 mm |
| June 2025 | 13.5 °C | −0.2 °C | 6 mm | 25 mm |
| July 2025 | 12.8 °C | −0.3 °C | 34 mm | 18 mm |
| August 2025 | 14.3 °C | −0.7 °C | 14 mm | 14 mm |
| September 2025 | – | – | 28 mm | 14 mm |
| October 2025 | 26.4 °C | +3.3 °C | 14 mm | 24 mm |
| November 2025 | 27.5 °C | +1.3 °C | 5 mm | 42 mm |
| December 2025 | 29.8 °C | +1.1 °C | 26 mm | 42 mm |
| January 2026 | 33.2 °C | +2.9 °C | 14 mm | 61 mm |
| February 2026 | 29.6 °C | +0.7 °C | 148 mm | 50 mm |
| March 2026 | 27.6 °C | +1.2 °C | 55 mm | 38 mm |
| April 2026 | 23.1 °C | +1.2 °C | 0 mm | 21 mm |
| May 2026 | 17.9 °C | +0.9 °C | 55 mm | 28 mm |
| June 2026 | 15.3 °C | +1.6 °C | 72 mm | 25 mm |
| July 2026 | 13.4 °C | +0.3 °C | 18 mm | 18 mm |
| August 2026 | 16.3 °C | +1.3 °C | 32 mm | 14 mm |
| September 2026 | – | – | 0 mm | 14 mm |
Data source and licence
Data source: Bureau of Meteorology (ACORN-SAT) and NOAA NCEI (GHCN-Daily) (dataset “ACORN-SAT v2 daily (homogenised) + GHCN-Daily”), licence CC BY 4.0; Public domain (NOAA NCEI). Last updated: 29 October 2026.
The data for Cunnamulla Post Office are shown as the source publishes them; this site does not correct them. A year is kept only if at least eleven months of measurements are available, and a normal is computed only with at least twenty years of data out of its thirty. Temperatures are rounded to 0.1 °C and rainfall to the millimetre. The station is one of 227 stations in Australia: the overview page lets you compare them.
Frequently asked questions
What is the annual mean temperature at Cunnamulla Post Office?
Over 1991–2020, the annual mean temperature at Cunnamulla Post Office is 22.0 °C. It was 21.2 °C over 1961–1990, a difference of +0.7 °C.
What is the warmest year ever measured at Cunnamulla Post Office?
Since records began in 1888, the warmest year at Cunnamulla Post Office is 2005, at 23.2 °C on average. The coldest is 1964 (20.4 °C).
Is the climate at Cunnamulla Post Office getting warmer?
Yes: at Cunnamulla Post Office, the annual mean temperature rises by 0.26 °C per decade between 1961 and 2025, +1.7 °C in total. 9 of the 10 warmest years in the series fall after 1999.
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