Average annual temperature is 13.3 °C
Absolute maximum temperature: 35.9 °C
Absolute minimum temperature: -0.6 °C
Number of sunny days: 249 days
Number of rainy days: 116 days
Look at detailed online map of San Ramon
* Weather data for San Ramon 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) | 18.4 | 19.1 | 20.3 | 30.0 | 29.1 | 31.3 | 35.9 | 34.3 | 29.0 | 34.9 | 25.7 | 19.8 |
| Average daytime temperature (°C) | 13.5 | 13.8 | 13.2 | 17.6 | 18.4 | 20.9 | 26.8 | 28.0 | 23.9 | 25.0 | 19.0 | 15.7 |
| Average temperature (°C) | 8.9 | 7.7 | 8.4 | 11.4 | 13.0 | 14.8 | 18.3 | 19.6 | 17.1 | 17.1 | 12.6 | 10.5 |
| Average night temperature (°C) | 5.8 | 3.5 | 5.0 | 6.8 | 9.7 | 11.0 | 12.5 | 14.3 | 12.8 | 11.8 | 7.8 | 7.0 |
| Absolute minimum temperature (°C) | -0.1 | 0.6 | -0.6 | 0.9 | 6.6 | 8.5 | 10.6 | 12.1 | 9.6 | 4.4 | 2.6 | 2.0 |
| 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) | 5.9 | 7.6 | 7.7 | 10.8 | 10.3 | 12.1 | 12.6 | 11.7 | 10.1 | 9.4 | 8.2 | 6.1 |
| Precipitation (mm) | 314 | 116 | 293 | 6 | 42 | 2 | 0 | 1 | 5 | 8 | 71 | 135 |
| Sunny days | 11 | 13 | 7 | 23 | 22 | 28 | 31 | 28 | 23 | 26 | 21 | 16 |
| Rainy days | 20 | 15 | 24 | 7 | 9 | 2 | 0 | 3 | 7 | 5 | 9 | 15 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit San Ramon during the most sunny months:
The largest precipitation sum in San Ramon is at