Gulgong Post Office is a weather station located 475 m above sea level, 0 km from Gulgong. Its records go back to 1882: 30 years of temperature are available up to 2018, along with rainfall and a comparison with two reference normals. Closed series: the records of this station end in 2018. Over 1991–2020 the annual mean temperature there is 16.6 °C; the 1961–1990 period is not documented well enough to compare. The warmest year of the series is 2009 (17.6 °C) and the coldest 1971 (15.0 °C). The last complete year, 2015, ranks 4 out of 30, from warmest to coldest. Over 1961–2018, the annual mean temperature changes by +0.25 °C per decade. The station ranks 48 out of 227 stations, from the fastest rise to the slowest.
Annual mean temperature since 1882
The first ten years of the series (1971–1981) average 15.7 °C; the last ten (2006–2015) average 16.7 °C, a difference of +0.9 °C. Of the ten warmest years in the series, 8 fall after 1999. The warmest is 2009 (17.6 °C). The ten-year running mean peaks at 16.7 °C (2009) and bottoms out at 15.7 °C (1978).
Annual rainfall since 1882
On average 644 mm of rain falls per year over the 134 documented years. The wettest year, 1950, received 1343 mm; the driest, 1888, only 299 mm, which is 4.5 times less. The 1991–2020 normal (671 mm per year) is 21 mm (3.2 %) above the 1961–1990 one (650 mm). Over 1991–2020, December is on average the wettest month (82 mm) and April the driest (29 mm). Between 1999 and 2018, 11 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 | – | 24.4 °C | – | 83 mm | 71 mm | −12 mm |
| February | – | 23.6 °C | – | 54 mm | 64 mm | +10 mm |
| March | – | 20.9 °C | – | 58 mm | 60 mm | +2 mm |
| April | – | 16.7 °C | – | 47 mm | 29 mm | −18 mm |
| May | – | 12.7 °C | – | 54 mm | 39 mm | −15 mm |
| June | – | 9.9 °C | – | 38 mm | 50 mm | +12 mm |
| July | – | 8.9 °C | – | 45 mm | 56 mm | +11 mm |
| August | – | 10.2 °C | – | 49 mm | 38 mm | −11 mm |
| September | – | 13.2 °C | – | 47 mm | 53 mm | +6 mm |
| October | – | 16.8 °C | – | 61 mm | 57 mm | −4 mm |
| November | – | 20.1 °C | – | 53 mm | 72 mm | +19 mm |
| December | – | 22.1 °C | – | 61 mm | 82 mm | +21 mm |
For rainfall, the largest difference is in December (+21 mm) and the smallest in April (−18 mm).
Records at Gulgong Post Office
- Warmest year: 17.6 °C, in 2009
- Coldest year: 15.0 °C, in 1971
- Driest year: 299 mm, in 1888
- Wettest year: 1343 mm, in 1950
- Warmest month: 27.0 °C, in January 2017
- Coldest month: 6.8 °C, in July 1970
- Wettest month: 354 mm, in February 1890
- Hottest day: 43.5 °C, on 11 February 2017
- Coldest day: −7.2 °C, on 16 July 1970
- Heaviest rain in one day: 134.4 mm, on 24 February 1955
2.6 °C separate the warmest year of the series from the coldest. Between the hottest and the coldest day on record, the range reaches 50.7 °C.
Temperature trend over 1961–2018
The regression line of annual mean temperature changes by +0.25 °C per decade between 1961 and 2018, about +1.4 °C over the whole period. That is faster than the median of the 227 stations (+0.19 °C per decade), by 0.06 °C per decade: the station ranks 48 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 Gulgong 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 Gulgong Post Office?
Over 1991–2020, the annual mean temperature at Gulgong Post Office is 16.6 °C.
What is the warmest year ever measured at Gulgong Post Office?
Since records began in 1882, the warmest year at Gulgong Post Office is 2009, at 17.6 °C on average. The coldest is 1971 (15.0 °C).
Is the climate at Gulgong Post Office getting warmer?
Yes: at Gulgong Post Office, the annual mean temperature rises by 0.25 °C per decade between 1961 and 2018, +1.4 °C in total. 8 of the 10 warmest years in the series fall after 1999.
Towns near this station
Neighbouring stations