Sydney Airport Amo is a weather station located 6 m above sea level, 23 km from Liverpool. Its records go back to 1930: 85 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 18.8 °C, clearly higher than over 1961–1990 (17.7 °C): a difference of 1.1 °C. The warmest year of the series is 2016 (19.7 °C) and the coldest 1943 (16.6 °C). The last complete year, 2025, ranks 3 out of 85, from warmest to coldest. Over 1961–2025, the annual mean temperature changes by +0.37 °C per decade. The station ranks 5 out of 227 stations, from the fastest rise to the slowest.
Annual mean temperature since 1930
The first ten years of the series (1940–1950) average 17.2 °C; the last ten (2016–2025) average 19.3 °C, a difference of +2.1 °C. All of the 10 warmest years in the series fall after 1999; the warmest is 2016 (19.7 °C). The ten-year running mean peaks at 19.3 °C (2020) and bottoms out at 17.2 °C (1952).
Annual rainfall since 1930
On average 1097 mm of rain falls per year over the 96 documented years. The wettest year, 2022, received 2273 mm; the driest, 1968, only 523 mm, which is 4.3 times less. The 1991–2020 normal (990 mm per year) is 188 mm (16.0 %) below the 1961–1990 one (1178 mm). Over 1991–2020, June is on average the wettest month (123 mm) and October the driest (56 mm). Between 2006 and 2025, 9 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 | 22.5 °C | 23.8 °C | +1.3 °C | 116 mm | 80 mm | −36 mm |
| February | 22.6 °C | 23.5 °C | +0.9 °C | 113 mm | 117 mm | +4 mm |
| March | 21.3 °C | 22.1 °C | +0.8 °C | 148 mm | 96 mm | −52 mm |
| April | 18.6 °C | 19.3 °C | +0.7 °C | 120 mm | 96 mm | −24 mm |
| May | 15.3 °C | 16.3 °C | +1.0 °C | 88 mm | 90 mm | +2 mm |
| June | 12.8 °C | 13.9 °C | +1.1 °C | 128 mm | 123 mm | −5 mm |
| July | 11.8 °C | 13.1 °C | +1.3 °C | 54 mm | 72 mm | +18 mm |
| August | 12.9 °C | 14.2 °C | +1.3 °C | 90 mm | 63 mm | −27 mm |
| September | 15.2 °C | 16.8 °C | +1.6 °C | 60 mm | 58 mm | −2 mm |
| October | 17.8 °C | 19.0 °C | +1.2 °C | 79 mm | 56 mm | −23 mm |
| November | 19.6 °C | 20.6 °C | +1.0 °C | 101 mm | 72 mm | −29 mm |
| December | 21.7 °C | 22.4 °C | +0.7 °C | 81 mm | 67 mm | −14 mm |
The largest temperature change is in September (+1.6 °C) and the smallest in April (+0.7 °C); over the year the mean difference is +1.1 °C, and 12 months out of twelve are warmer than before. For rainfall, the largest difference is in July (+18 mm) and the smallest in March (−52 mm).
Records at Sydney Airport Amo
- Warmest year: 19.7 °C, in 2016
- Coldest year: 16.6 °C, in 1943
- Driest year: 523 mm, in 1968
- Wettest year: 2273 mm, in 2022
- Warmest month: 26.0 °C, in January 2019
- Coldest month: 10.1 °C, in July 1939
- Wettest month: 597 mm, in February 1956
- Hottest day: 46.4 °C, on 18 January 2013
- Coldest day: −0.1 °C, on 23 July 1943
- Heaviest rain in one day: 216.2 mm, on 3 February 1990
3.1 °C separate the warmest year of the series from the coldest. Between the hottest and the coldest day on record, the range reaches 46.5 °C.
Temperature trend over 1961–2025
The regression line of annual mean temperature changes by +0.37 °C per decade between 1961 and 2025, about +2.4 °C over the whole period. That is faster than the median of the 227 stations (+0.19 °C per decade), by 0.18 °C per decade: the station ranks 5 out of 227.
The last 24 months against the 1991–2020 normal
Over the last 24 months (October 2024 to September 2026), 21 months out of 24 were warmer than the 1991–2020 normal for the same month; the mean departure is +0.9 °C. The highest departure was in October 2025 (+2.6 °C); the lowest, in June 2025 (−0.7 °C). The last twelve months add up to 756 mm of rain, which is 76 % of the 1991–2020 annual normal (990 mm).
| Month | Temperature | Departure from normal | Rain | Normal rain |
|---|---|---|---|---|
| October 2024 | 18.9 °C | −0.1 °C | 39 mm | 56 mm |
| November 2024 | 22.3 °C | +1.7 °C | 134 mm | 72 mm |
| December 2024 | 24.1 °C | +1.7 °C | 19 mm | 67 mm |
| January 2025 | 23.4 °C | −0.4 °C | 156 mm | 80 mm |
| February 2025 | 23.9 °C | +0.4 °C | 54 mm | 117 mm |
| March 2025 | 23.6 °C | +1.5 °C | 124 mm | 96 mm |
| April 2025 | 20.6 °C | +1.3 °C | 131 mm | 96 mm |
| May 2025 | 17.4 °C | +1.1 °C | 213 mm | 90 mm |
| June 2025 | 13.2 °C | −0.7 °C | 15 mm | 123 mm |
| July 2025 | 13.5 °C | +0.4 °C | 140 mm | 72 mm |
| August 2025 | 14.3 °C | +0.1 °C | 353 mm | 63 mm |
| September 2025 | 18.4 °C | +1.6 °C | – | 58 mm |
| October 2025 | 21.6 °C | +2.6 °C | 19 mm | 56 mm |
| November 2025 | 22.0 °C | +1.4 °C | 54 mm | 72 mm |
| December 2025 | 23.3 °C | +0.9 °C | 24 mm | 67 mm |
| January 2026 | 23.9 °C | +0.1 °C | 121 mm | 80 mm |
| February 2026 | 24.4 °C | +0.9 °C | 82 mm | 117 mm |
| March 2026 | 22.7 °C | +0.6 °C | 108 mm | 96 mm |
| April 2026 | 19.7 °C | +0.4 °C | 33 mm | 96 mm |
| May 2026 | 17.8 °C | +1.5 °C | 104 mm | 90 mm |
| June 2026 | 15.8 °C | +1.9 °C | 74 mm | 123 mm |
| July 2026 | 14.2 °C | +1.1 °C | 50 mm | 72 mm |
| August 2026 | 15.2 °C | +1.0 °C | 47 mm | 63 mm |
| September 2026 | 18.6 °C | +1.8 °C | 40 mm | 58 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 Sydney Airport Amo 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 Sydney Airport Amo?
Over 1991–2020, the annual mean temperature at Sydney Airport Amo is 18.8 °C. It was 17.7 °C over 1961–1990, a difference of +1.1 °C.
What is the warmest year ever measured at Sydney Airport Amo?
Since records began in 1930, the warmest year at Sydney Airport Amo is 2016, at 19.7 °C on average. The coldest is 1943 (16.6 °C).
Is the climate at Sydney Airport Amo getting warmer?
Yes: at Sydney Airport Amo, the annual mean temperature rises by 0.37 °C per decade between 1961 and 2025, +2.4 °C in total. 10 of the 10 warmest years in the series fall after 1999.
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