San Francisco weather in 2025
San Francisco weather in 2025, with 365 daily observations from Open-Meteo archive data.
Interactive graph
Open San Francisco in the interactive graph
Use the graph view to inspect 2025 alongside other available years for San Francisco.
Year summary
In 2025, San Francisco averaged 17.3 C for daily highs and 11.0 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 -204.8 mm from the baseline total.
The warmest month was September, with an average high of 21.3 C, while January had the lowest average low at 7.2 C.
The wettest month was February, totaling 140.6 mm. The hottest day reached 31.5 C on September 23, 2025.
Monthly averages and precipitation
| Month | Avg low C | Avg high C | Rain and snow mm | Days |
|---|---|---|---|---|
| January | 7.2 | 14.8 | 24.2 | 31 |
| February | 8.1 | 14.8 | 140.6 | 28 |
| March | 8.9 | 15.3 | 91.7 | 31 |
| April | 10.1 | 16.8 | 10.0 | 30 |
| May | 11.4 | 19.0 | 4.1 | 31 |
| June | 11.7 | 17.7 | 0.0 | 30 |
| July | 12.8 | 17.1 | 1.0 | 31 |
| August | 13.9 | 20.1 | 0.3 | 31 |
| September | 15.4 | 21.3 | 8.3 | 30 |
| October | 13.4 | 20.3 | 37.8 | 31 |
| November | 11.0 | 16.5 | 87.8 | 30 |
| December | 8.2 | 13.3 | 127.5 | 31 |
Daily records in 2025
| Record | Date | Value |
|---|---|---|
| Hottest day | September 23, 2025 | 31.5 C |
| Coldest night | January 27, 2025 | 3.8 C |
| Wettest day | February 13, 2025 | 34.8 mm |
Related pages
Weather data source: Open-Meteo Archive API. City metadata source: GeoNames cities15000.