Derby Aero is a weather station located 6 m above sea level, 8 km from Derby. Its records go back to 1959: 32 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 28.1 °C; the 1961–1990 period is not documented well enough to compare. The warmest year of the series is 2016 (29.9 °C) and the coldest 1976 (26.7 °C). The last complete year, 2025, ranks 18 out of 32, from warmest to coldest. Over 1961–2025, the annual mean temperature changes by +0.10 °C per decade. The station ranks 205 out of 227 stations, from the fastest rise to the slowest.
Annual mean temperature since 1959
The first ten years of the series (1973–2002) average 27.9 °C; the last ten (2015–2025) average 28.6 °C, a difference of +0.7 °C. Of the ten warmest years in the series, 7 fall after 1999. The warmest is 2016 (29.9 °C). The ten-year running mean peaks at 28.7 °C (2024) and bottoms out at 27.9 °C (2012).
Annual rainfall since 1959
On average 717 mm of rain falls per year over the 56 documented years. The wettest year, 2000, received 1297 mm; the driest, 1959, only 86 mm, which is 15.1 times less. The 1991–2020 normal (826 mm per year) is 172 mm (26.3 %) above the 1961–1990 one (654 mm). Over 1991–2020, January is on average the wettest month (230 mm) and September the driest (1 mm). Between 2005 and 2025, 15 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 | – | 30.5 °C | – | 205 mm | 230 mm | +25 mm |
| February | – | 30.2 °C | – | 202 mm | 219 mm | +17 mm |
| March | – | 30.4 °C | – | 132 mm | 161 mm | +29 mm |
| April | – | 29.4 °C | – | 20 mm | 19 mm | −1 mm |
| May | – | 25.9 °C | – | 16 mm | 21 mm | +5 mm |
| June | – | 23.1 °C | – | 7 mm | 7 mm | 0 mm |
| July | – | 22.7 °C | – | 5 mm | 10 mm | +5 mm |
| August | – | 23.9 °C | – | 1 mm | 2 mm | +1 mm |
| September | – | 27.5 °C | – | 2 mm | 1 mm | −1 mm |
| October | – | 30.3 °C | – | 3 mm | 5 mm | +2 mm |
| November | – | 32.0 °C | – | 8 mm | 16 mm | +8 mm |
| December | – | 31.6 °C | – | 53 mm | 135 mm | +82 mm |
For rainfall, the largest difference is in December (+82 mm) and the smallest in April (−1 mm).
Records at Derby Aero
- Warmest year: 29.9 °C, in 2016
- Coldest year: 26.7 °C, in 1976
- Driest year: 86 mm, in 1959
- Wettest year: 1297 mm, in 2000
- Warmest month: 34.1 °C, in December 2019
- Coldest month: 20.3 °C, in June 2011
- Wettest month: 757 mm, in January 2018
- Hottest day: 45.6 °C, on 21 December 2018
- Coldest day: 6.0 °C, on 1 July 2004
- Heaviest rain in one day: 294.4 mm, on 29 January 1978
3.2 °C separate the warmest year of the series from the coldest. Between the hottest and the coldest day on record, the range reaches 39.6 °C.
Temperature trend over 1961–2025
The regression line of annual mean temperature changes by +0.10 °C per decade between 1961 and 2025, about +0.6 °C over the whole period. That is slower than the median of the 227 stations (+0.19 °C per decade), by 0.09 °C per decade: the station ranks 205 out of 227.
The last 24 months against the 1991–2020 normal
Over the last 20 months (October 2024 to September 2026), 11 months out of 20 were warmer than the 1991–2020 normal for the same month; the mean departure is +0.2 °C. The highest departure was in October 2024 (+1.9 °C); the lowest, in July 2025 (−1.1 °C). The last twelve months add up to 604 mm of rain, which is 73 % of the 1991–2020 annual normal (826 mm).
| Month | Temperature | Departure from normal | Rain | Normal rain |
|---|---|---|---|---|
| October 2024 | 32.2 °C | +1.9 °C | – | 5 mm |
| November 2024 | 32.7 °C | +0.7 °C | 63 mm | 16 mm |
| December 2024 | 32.4 °C | +0.8 °C | 172 mm | 135 mm |
| January 2025 | 30.7 °C | +0.2 °C | 253 mm | 230 mm |
| February 2025 | 30.4 °C | +0.2 °C | 137 mm | 219 mm |
| March 2025 | 30.4 °C | 0.0 °C | 370 mm | 161 mm |
| April 2025 | 28.7 °C | −0.7 °C | 60 mm | 19 mm |
| May 2025 | 25.2 °C | −0.7 °C | 50 mm | 21 mm |
| June 2025 | 22.6 °C | −0.5 °C | 0 mm | 7 mm |
| July 2025 | 21.6 °C | −1.1 °C | 0 mm | 10 mm |
| August 2025 | 24.4 °C | +0.5 °C | 0 mm | 2 mm |
| September 2025 | 27.8 °C | +0.3 °C | 0 mm | 1 mm |
| October 2025 | 31.3 °C | +1.0 °C | 15 mm | 5 mm |
| November 2025 | 32.0 °C | 0.0 °C | 15 mm | 16 mm |
| December 2025 | 31.0 °C | −0.6 °C | 157 mm | 135 mm |
| January 2026 | 30.8 °C | +0.3 °C | 303 mm | 230 mm |
| February 2026 | 29.5 °C | −0.7 °C | 103 mm | 219 mm |
| July 2026 | 22.7 °C | 0.0 °C | 1 mm | 10 mm |
| August 2026 | 25.4 °C | +1.5 °C | 10 mm | 2 mm |
| September 2026 | 28.5 °C | +1.0 °C | 0 mm | 1 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 Derby Aero 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 Derby Aero?
Over 1991–2020, the annual mean temperature at Derby Aero is 28.1 °C.
What is the warmest year ever measured at Derby Aero?
Since records began in 1959, the warmest year at Derby Aero is 2016, at 29.9 °C on average. The coldest is 1976 (26.7 °C).
Is the climate at Derby Aero getting warmer?
Yes: at Derby Aero, the annual mean temperature rises by 0.10 °C per decade between 1961 and 2025, +0.6 °C in total. 7 of the 10 warmest years in the series fall after 1999.
Towns near this station
Neighbouring stations