Sydney weather in 2025
Sydney weather in 2025, with 365 daily observations from Open-Meteo archive data.
Interactive graph
Open Sydney in the interactive graph
Use the graph view to inspect 2025 alongside other available years for Sydney.
Year summary
In 2025, Sydney averaged 22.4 C for daily highs and 14.4 C for daily lows.
A 1991-2020 normal is not available for this location yet, so this page compares 2025 with the 2023-2025 archive baseline. The 2025 average daily high was 0.0 C from that baseline, and total precipitation was +194.0 mm from the baseline total.
The warmest month was December, with an average high of 26.5 C, while June had the lowest average low at 7.5 C.
The wettest month was August, totaling 233.1 mm. The hottest day reached 39.0 C on December 19, 2025.
Monthly averages and precipitation
| Month | Avg low C | Avg high C | Rain and snow mm | Days |
|---|---|---|---|---|
| January | 19.0 | 25.2 | 188.5 | 31 |
| February | 19.4 | 26.1 | 66.2 | 28 |
| March | 19.7 | 25.4 | 113.0 | 31 |
| April | 15.5 | 23.2 | 100.4 | 30 |
| May | 13.0 | 19.4 | 195.3 | 31 |
| June | 7.5 | 16.3 | 15.9 | 30 |
| July | 8.5 | 16.2 | 124.6 | 31 |
| August | 9.9 | 16.9 | 233.1 | 31 |
| September | 11.7 | 22.1 | 78.6 | 30 |
| October | 15.3 | 25.7 | 31.5 | 31 |
| November | 16.2 | 25.6 | 47.8 | 30 |
| December | 17.5 | 26.5 | 67.9 | 31 |
Daily records in 2025
| Record | Date | Value |
|---|---|---|
| Hottest day | December 19, 2025 | 39.0 C |
| Coldest night | June 19, 2025 | 3.9 C |
| Wettest day | August 21, 2025 | 66.6 mm |
Related pages
Weather data source: Open-Meteo Archive API. City metadata source: GeoNames cities15000.