Jerrys Plains Post Office is a weather station located 90 m above sea level, 24 km from Singleton Heights. Its records go back to 1886: 42 years of temperature are available up to 2011, along with rainfall and a comparison with two reference normals. Closed series: the records of this station end in 2011. Over the whole series (42 years) the annual mean temperature there is 17.7 °C; the 1961–1990 and 1991–2020 reference periods are not documented well enough for a comparison. The warmest year of the series is 1980 (18.8 °C) and the coldest 1971 (16.6 °C). The last complete year, 2003, ranks 27 out of 42, from warmest to coldest. Over 1961–2011, the annual mean temperature changes by +0.18 °C per decade. The station ranks 125 out of 227 stations, from the fastest rise to the slowest.
Annual mean temperature since 1886
The first ten years of the series (1957–1966) average 17.5 °C; the last ten (1990–2003) average 18.0 °C, a difference of +0.5 °C. Of the ten warmest years in the series, 1 fall after 1999. The warmest is 1980 (18.8 °C). The ten-year running mean peaks at 17.9 °C (1983) and bottoms out at 17.3 °C (1971).
Annual rainfall since 1886
On average 644 mm of rain falls per year over the 125 documented years. The wettest year, 1950, received 1191 mm; the driest, 1888, only 239 mm, which is 5.0 times less. The 1991–2020 normal (657 mm per year) is 11 mm (1.6 %) below the 1961–1990 one (668 mm). Over 1991–2020, February is on average the wettest month (95 mm) and April the driest (31 mm). Between 1992 and 2011, 13 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 | 24.0 °C | 24.9 °C | +0.9 °C | 95 mm | 60 mm | −35 mm |
| February | 23.6 °C | – | – | 73 mm | 95 mm | +22 mm |
| March | 21.6 °C | – | – | 61 mm | 64 mm | +3 mm |
| April | 18.2 °C | – | – | 47 mm | 31 mm | −16 mm |
| May | 14.4 °C | – | – | 54 mm | 36 mm | −18 mm |
| June | 11.6 °C | – | – | 41 mm | 48 mm | +7 mm |
| July | 10.4 °C | – | – | 33 mm | 36 mm | +3 mm |
| August | 11.7 °C | – | – | 41 mm | 31 mm | −10 mm |
| September | 14.5 °C | – | – | 40 mm | 47 mm | +7 mm |
| October | 17.9 °C | – | – | 62 mm | 48 mm | −14 mm |
| November | 20.5 °C | 21.1 °C | +0.6 °C | 56 mm | 86 mm | +30 mm |
| December | 23.2 °C | – | – | 65 mm | 75 mm | +10 mm |
For rainfall, the largest difference is in November (+30 mm) and the smallest in January (−35 mm).
Records at Jerrys Plains Post Office
- Warmest year: 18.8 °C, in 1980
- Coldest year: 16.6 °C, in 1971
- Driest year: 239 mm, in 1888
- Wettest year: 1191 mm, in 1950
- Warmest month: 27.2 °C, in February 1983
- Coldest month: 8.8 °C, in July 1957
- Wettest month: 340 mm, in February 1955
- Hottest day: 45.6 °C, on 25 December 1957
- Coldest day: −5.8 °C, on 16 July 2010
- Heaviest rain in one day: 190.8 mm, on 18 June 1930
2.2 °C separate the warmest year of the series from the coldest. Between the hottest and the coldest day on record, the range reaches 51.4 °C.
Temperature trend over 1961–2011
The regression line of annual mean temperature changes by +0.18 °C per decade between 1961 and 2011, about +0.9 °C over the whole period. That is slower than the median of the 227 stations (+0.19 °C per decade), by 0.01 °C per decade: the station ranks 125 out of 227.
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 Jerrys Plains 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 Jerrys Plains Post Office?
Over the whole series (42 years), the annual mean temperature at Jerrys Plains Post Office is 17.7 °C.
What is the warmest year ever measured at Jerrys Plains Post Office?
Since records began in 1886, the warmest year at Jerrys Plains Post Office is 1980, at 18.8 °C on average. The coldest is 1971 (16.6 °C).
Is the climate at Jerrys Plains Post Office getting warmer?
Yes: at Jerrys Plains Post Office, the annual mean temperature rises by 0.18 °C per decade between 1961 and 2011, +0.9 °C in total. 1 of the 10 warmest years in the series fall after 1999.
Towns near this station
Neighbouring stations