Average annual temperature is 12.9 °C
Absolute maximum temperature: 34.5 °C
Absolute minimum temperature: -10.8 °C
Number of sunny days: 179 days
Number of rainy days: 180 days
Number of snow days: 6 days
Look at detailed online map of Mount Wilson
* Weather data for Mount Wilson 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) | 16.9 | 19.3 | 20.0 | 30.5 | 30.0 | 34.5 | 34.4 | 31.7 | 33.6 | 27.3 | 21.5 | 16.3 |
| Average daytime temperature (°C) | 8.1 | 9.9 | 10.8 | 19.8 | 22.9 | 26.6 | 30.1 | 28.1 | 24.2 | 19.2 | 11.2 | 8.6 |
| Average temperature (°C) | 4.3 | 4.2 | 5.1 | 13.2 | 16.0 | 20.2 | 24.5 | 22.9 | 19.3 | 14.1 | 6.0 | 4.6 |
| Average night temperature (°C) | 1.4 | -0.3 | 0.4 | 7.7 | 9.4 | 14.7 | 19.6 | 18.3 | 15.0 | 9.9 | 1.9 | 1.4 |
| Absolute minimum temperature (°C) | -4.5 | -10.8 | -6.1 | 0.2 | 2.5 | 9.5 | 16.6 | 14.3 | 9.4 | 2.6 | -5.8 | -4.4 |
| 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 | 15.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.7 | 10.7 | 11.9 | 13.3 | 14.4 | 15.0 | 14.7 | 13.7 | 12.5 | 11.1 | 10.0 | 9.4 |
| 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) | 4.8 | 6.8 | 7.4 | 9.1 | 11.5 | 10.8 | 12.2 | 10.6 | 8.1 | 8.2 | 7.6 | 4.3 |
| Precipitation (mm) | 82 | 37 | 66 | 125 | 15 | 107 | 102 | 139 | 121 | 68 | 74 | 125 |
| Sunny days | 12 | 16 | 12 | 16 | 21 | 12 | 7 | 13 | 15 | 20 | 20 | 15 |
| Rainy days | 19 | 10 | 18 | 14 | 10 | 18 | 24 | 18 | 15 | 11 | 9 | 14 |
| Snow days | 0 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 |
The best time to visit Mount Wilson during the most sunny months:
The largest precipitation sum in Mount Wilson is at