Average annual temperature is 13.0 °C
Absolute maximum temperature: 33.1 °C
Absolute minimum temperature: 2.5 °C
Number of sunny days: 248 days
Number of rainy days: 117 days
Look at detailed online map of City of San Bruno
* Weather data for City of San Bruno United States is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 17.2 | 15.9 | 17.8 | 21.7 | 20.6 | 20.5 | 25.4 | 26.6 | 22.8 | 33.1 | 24.1 | 17.7 |
| Average daytime temperature (°C) | 13.5 | 12.4 | 12.2 | 14.2 | 15.7 | 17.7 | 19.8 | 21.0 | 20.3 | 22.1 | 17.7 | 15.0 |
| Average temperature (°C) | 10.3 | 8.5 | 9.4 | 10.8 | 12.7 | 14.1 | 15.3 | 16.8 | 16.5 | 16.5 | 13.4 | 11.7 |
| Average night temperature (°C) | 7.8 | 5.5 | 7.2 | 8.2 | 10.5 | 11.8 | 12.3 | 14.0 | 13.9 | 12.9 | 10.4 | 9.3 |
| Absolute minimum temperature (°C) | 2.5 | 2.6 | 4.0 | 4.9 | 8.3 | 10.4 | 11.2 | 12.5 | 12.4 | 8.1 | 6.3 | 5.3 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.9 | 10.8 | 12.0 | 13.2 | 14.2 | 14.7 | 14.5 | 13.6 | 12.4 | 11.2 | 10.2 | 9.6 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 6.2 | 7.8 | 8.2 | 11.2 | 10.8 | 12.0 | 12.3 | 11.3 | 10.6 | 9.4 | 7.9 | 5.8 |
| Precipitation (mm) | 254 | 85 | 229 | 11 | 40 | 0 | 0 | 0 | 3 | 6 | 107 | 173 |
| Sunny days | 12 | 14 | 8 | 24 | 20 | 27 | 31 | 29 | 24 | 25 | 20 | 14 |
| Rainy days | 19 | 14 | 23 | 6 | 11 | 3 | 0 | 2 | 6 | 6 | 10 | 17 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit City of San Bruno during the most sunny months:
The largest precipitation sum in City of San Bruno is at