Orbost is a weather station located 63 m above sea level, 1 km from Orbost. Its records go back to 1939: 66 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 15.0 °C, noticeably higher than over 1961–1990 (14.6 °C): a difference of 0.4 °C. The warmest year of the series is 2013 (15.7 °C) and the coldest 1943 (13.5 °C). The last complete year, 2025, ranks 7 out of 66, from warmest to coldest. Over 1961–2025, the annual mean temperature changes by +0.18 °C per decade. The station ranks 122 out of 227 stations, from the fastest rise to the slowest.
Annual mean temperature since 1939
The first ten years of the series (1939–1953) average 14.3 °C; the last ten (2007–2025) average 15.4 °C, a difference of +1.1 °C. Of the ten warmest years in the series, 7 fall after 1999. The warmest is 2013 (15.7 °C). The ten-year running mean peaks at 15.3 °C (2014) and bottoms out at 14.3 °C (1958).
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 | 19.1 °C | 20.2 °C | +1.1 °C | – | 43 mm | – |
| February | 19.6 °C | 20.0 °C | +0.4 °C | – | – | – |
| March | 18.2 °C | 18.2 °C | 0.0 °C | – | – | – |
| April | 15.5 °C | 15.5 °C | 0.0 °C | – | – | – |
| May | 12.9 °C | 13.2 °C | +0.3 °C | – | – | – |
| June | 10.3 °C | 10.7 °C | +0.4 °C | – | – | – |
| July | 9.6 °C | 10.2 °C | +0.6 °C | – | 61 mm | – |
| August | 10.5 °C | 10.9 °C | +0.4 °C | – | – | – |
| September | 11.9 °C | 12.6 °C | +0.7 °C | – | 61 mm | – |
| October | 13.9 °C | 14.3 °C | +0.4 °C | – | – | – |
| November | 15.5 °C | 16.2 °C | +0.7 °C | – | – | – |
| December | 17.7 °C | 18.0 °C | +0.3 °C | – | – | – |
The largest temperature change is in January (+1.1 °C) and the smallest in March (0.0 °C); over the year the mean difference is +0.4 °C, and 10 months out of twelve are warmer than before.
Records at Orbost
- Warmest year: 15.7 °C, in 2013
- Coldest year: 13.5 °C, in 1943
- Driest year: 516 mm, in 2017
- Wettest year: 1092 mm, in 2011
- Warmest month: 22.2 °C, in February 2000
- Coldest month: 8.1 °C, in July 1938
- Wettest month: 343 mm, in June 2013
- Hottest day: 45.7 °C, on 24 January 1982
- Coldest day: −2.4 °C, on 5 July 1957
- Heaviest rain in one day: 107.0 mm, on 22 September 2020
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 48.1 °C.
Temperature trend over 1961–2025
The regression line of annual mean temperature changes by +0.18 °C per decade between 1961 and 2025, about +1.2 °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 122 out of 227.
The last 24 months against the 1991–2020 normal
Over the last 24 months (October 2024 to September 2026), 10 months out of 15 were warmer than the 1991–2020 normal for the same month; the mean departure is +0.4 °C. The highest departure was in November 2024 (+2.3 °C); the lowest, in December 2025 (−0.9 °C).
| Month | Temperature | Departure from normal | Rain | Normal rain |
|---|---|---|---|---|
| October 2024 | 14.4 °C | +0.1 °C | 35 mm | – |
| November 2024 | 18.5 °C | +2.3 °C | 62 mm | – |
| December 2024 | 19.1 °C | +1.1 °C | 45 mm | – |
| January 2025 | 20.2 °C | 0.0 °C | 77 mm | 43 mm |
| February 2025 | 20.8 °C | +0.8 °C | 193 mm | – |
| March 2025 | 19.3 °C | +1.1 °C | 81 mm | – |
| April 2025 | 16.8 °C | +1.3 °C | 51 mm | – |
| May 2025 | 13.5 °C | +0.3 °C | 33 mm | – |
| June 2025 | 9.9 °C | −0.8 °C | 78 mm | – |
| July 2025 | 10.7 °C | +0.5 °C | 75 mm | 61 mm |
| August 2025 | 11.1 °C | +0.2 °C | 41 mm | – |
| September 2025 | 13.5 °C | +0.9 °C | 17 mm | 61 mm |
| October 2025 | 14.2 °C | −0.1 °C | 57 mm | – |
| November 2025 | 15.6 °C | −0.6 °C | 115 mm | – |
| December 2025 | 17.1 °C | −0.9 °C | 70 mm | – |
| January 2026 | – | – | 41 mm | 43 mm |
| February 2026 | – | – | 104 mm | – |
| March 2026 | – | – | 84 mm | – |
| April 2026 | – | – | 16 mm | – |
| May 2026 | – | – | 55 mm | – |
| June 2026 | – | – | 62 mm | – |
| July 2026 | – | – | 18 mm | 61 mm |
| August 2026 | – | – | 27 mm | – |
| September 2026 | – | – | 30 mm | 61 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 Orbost 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 Orbost?
Over 1991–2020, the annual mean temperature at Orbost is 15.0 °C. It was 14.6 °C over 1961–1990, a difference of +0.4 °C.
What is the warmest year ever measured at Orbost?
Since records began in 1939, the warmest year at Orbost is 2013, at 15.7 °C on average. The coldest is 1943 (13.5 °C).
Is the climate at Orbost getting warmer?
Yes: at Orbost, the annual mean temperature rises by 0.18 °C per decade between 1961 and 2025, +1.2 °C in total. 7 of the 10 warmest years in the series fall after 1999.
Towns near this station
Neighbouring stations