Dwellingup is a weather station located 267 m above sea level, 20 km from Pinjarra. Its records go back to 1934: 60 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 16.4 °C, noticeably higher than over 1961–1990 (15.7 °C): a difference of 0.6 °C. The warmest year of the series is 2011 (17.9 °C) and the coldest 1960 (14.4 °C). The last complete year, 2025, ranks 4 out of 60, from warmest to coldest. Over 1961–2025, the annual mean temperature changes by +0.24 °C per decade. The station ranks 69 out of 227 stations, from the fastest rise to the slowest.
Annual mean temperature since 1934
The first ten years of the series (1957–1967) average 15.5 °C; the last ten (2016–2025) average 16.6 °C, a difference of +1.2 °C. Of the ten warmest years in the series, 9 fall after 1999. The warmest is 2011 (17.9 °C). The ten-year running mean peaks at 16.7 °C (2020) and bottoms out at 15.3 °C (1969).
Annual rainfall since 1934
On average 1210 mm of rain falls per year over the 91 documented years. The wettest year, 1955, received 1977 mm; the driest, 2010, only 590 mm, which is 3.4 times less. The 1991–2020 normal (1119 mm per year) is 134 mm (10.7 %) below the 1961–1990 one (1253 mm). Over 1991–2020, July is on average the wettest month (205 mm) and January the driest (14 mm). Between 2006 and 2025, 4 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 | 22.1 °C | 22.8 °C | +0.7 °C | 16 mm | 14 mm | −2 mm |
| February | 22.1 °C | 22.8 °C | +0.7 °C | 27 mm | 16 mm | −11 mm |
| March | 20.1 °C | 20.7 °C | +0.6 °C | 25 mm | 28 mm | +3 mm |
| April | 16.3 °C | 17.2 °C | +0.9 °C | 78 mm | 52 mm | −26 mm |
| May | 13.2 °C | 13.7 °C | +0.5 °C | 158 mm | 144 mm | −14 mm |
| June | 11.3 °C | 11.5 °C | +0.2 °C | 249 mm | 196 mm | −53 mm |
| July | 10.2 °C | 10.7 °C | +0.5 °C | 237 mm | 205 mm | −32 mm |
| August | 10.4 °C | 11.1 °C | +0.7 °C | 184 mm | 191 mm | +7 mm |
| September | 12.0 °C | 12.3 °C | +0.3 °C | 126 mm | 140 mm | +14 mm |
| October | 14.1 °C | 14.9 °C | +0.8 °C | 88 mm | 64 mm | −24 mm |
| November | 17.0 °C | 18.0 °C | +1.0 °C | 45 mm | 49 mm | +4 mm |
| December | 20.1 °C | 20.7 °C | +0.6 °C | 20 mm | 20 mm | 0 mm |
The largest temperature change is in November (+1.0 °C) and the smallest in June (+0.2 °C); over the year the mean difference is +0.6 °C, and 12 months out of twelve are warmer than before. For rainfall, the largest difference is in September (+14 mm) and the smallest in June (−53 mm).
Records at Dwellingup
- Warmest year: 17.9 °C, in 2011
- Coldest year: 14.4 °C, in 1960
- Driest year: 590 mm, in 2010
- Wettest year: 1977 mm, in 1955
- Warmest month: 25.7 °C, in February 1985
- Coldest month: 8.5 °C, in July 1960
- Wettest month: 719 mm, in June 1945
- Hottest day: 43.5 °C, on 23 February 1991
- Coldest day: −3.9 °C, on 29 July 1962
- Heaviest rain in one day: 177.5 mm, on 17 February 1955
3.5 °C separate the warmest year of the series from the coldest. Between the hottest and the coldest day on record, the range reaches 47.4 °C.
Temperature trend over 1961–2025
The regression line of annual mean temperature changes by +0.24 °C per decade between 1961 and 2025, about +1.5 °C over the whole period. That is faster than the median of the 227 stations (+0.19 °C per decade), by 0.05 °C per decade: the station ranks 69 out of 227.
The last 24 months against the 1991–2020 normal
Over the last 24 months (October 2024 to September 2026), 17 months out of 24 were warmer than the 1991–2020 normal for the same month; the mean departure is +0.6 °C. The highest departure was in September 2026 (+2.2 °C); the lowest, in April 2026 (−0.8 °C). The last twelve months add up to 964 mm of rain, which is 86 % of the 1991–2020 annual normal (1119 mm).
| Month | Temperature | Departure from normal | Rain | Normal rain |
|---|---|---|---|---|
| October 2024 | 16.1 °C | +1.2 °C | 83 mm | 64 mm |
| November 2024 | 18.2 °C | +0.2 °C | 16 mm | 49 mm |
| December 2024 | 22.1 °C | +1.4 °C | 2 mm | 20 mm |
| January 2025 | 24.5 °C | +1.7 °C | 1 mm | 14 mm |
| February 2025 | 22.9 °C | +0.1 °C | 1 mm | 16 mm |
| March 2025 | 22.6 °C | +1.9 °C | 22 mm | 28 mm |
| April 2025 | 18.4 °C | +1.2 °C | 11 mm | 52 mm |
| May 2025 | 15.0 °C | +1.3 °C | 57 mm | 144 mm |
| June 2025 | 12.5 °C | +1.0 °C | 156 mm | 196 mm |
| July 2025 | 9.9 °C | −0.8 °C | 212 mm | 205 mm |
| August 2025 | 11.1 °C | 0.0 °C | 254 mm | 191 mm |
| September 2025 | 12.7 °C | +0.4 °C | 126 mm | 140 mm |
| October 2025 | 14.2 °C | −0.7 °C | 75 mm | 64 mm |
| November 2025 | 17.9 °C | −0.1 °C | 40 mm | 49 mm |
| December 2025 | 22.0 °C | +1.3 °C | 0 mm | 20 mm |
| January 2026 | 23.1 °C | +0.3 °C | 4 mm | 14 mm |
| February 2026 | 23.3 °C | +0.5 °C | 0 mm | 16 mm |
| March 2026 | 21.8 °C | +1.1 °C | 117 mm | 28 mm |
| April 2026 | 16.4 °C | −0.8 °C | 62 mm | 52 mm |
| May 2026 | 13.1 °C | −0.6 °C | 94 mm | 144 mm |
| June 2026 | 11.3 °C | −0.2 °C | 215 mm | 196 mm |
| July 2026 | 11.2 °C | +0.5 °C | 110 mm | 205 mm |
| August 2026 | 11.9 °C | +0.8 °C | 170 mm | 191 mm |
| September 2026 | 14.5 °C | +2.2 °C | 77 mm | 140 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 Dwellingup 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 Dwellingup?
Over 1991–2020, the annual mean temperature at Dwellingup is 16.4 °C. It was 15.7 °C over 1961–1990, a difference of +0.6 °C.
What is the warmest year ever measured at Dwellingup?
Since records began in 1934, the warmest year at Dwellingup is 2011, at 17.9 °C on average. The coldest is 1960 (14.4 °C).
Is the climate at Dwellingup getting warmer?
Yes: at Dwellingup, the annual mean temperature rises by 0.24 °C per decade between 1961 and 2025, +1.5 °C in total. 9 of the 10 warmest years in the series fall after 1999.
Towns near this station
Neighbouring stations