Average annual temperature is 17.8 °C
Absolute maximum temperature: 46.8 °C
Absolute minimum temperature: -1.4 °C
Number of sunny days: 270 days
Number of rainy days: 95 days
Look at detailed online map of Colusa County
* Weather data for Colusa County 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) | 18.9 | 21.6 | 19.5 | 34.3 | 37.3 | 43.4 | 46.8 | 45.0 | 39.6 | 35.3 | 27.3 | 19.7 |
| Average daytime temperature (°C) | 14.1 | 15.0 | 15.0 | 23.4 | 29.5 | 34.8 | 41.2 | 39.1 | 32.8 | 28.1 | 19.9 | 16.0 |
| Average temperature (°C) | 8.9 | 7.8 | 8.9 | 15.2 | 20.8 | 25.2 | 30.4 | 29.4 | 23.8 | 18.8 | 12.8 | 10.2 |
| Average night temperature (°C) | 5.5 | 2.8 | 4.4 | 8.5 | 13.1 | 16.5 | 20.3 | 20.7 | 16.3 | 12.0 | 7.5 | 5.8 |
| Absolute minimum temperature (°C) | -0.8 | -1.1 | -1.4 | 1.2 | 6.9 | 12.5 | 13.6 | 15.9 | 12.0 | 2.6 | 0.5 | 0.1 |
| 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) | 9.8 | 10.7 | 12.0 | 13.2 | 14.3 | 14.9 | 14.6 | 13.7 | 12.4 | 11.2 | 10.1 | 9.5 |
| 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) | 5.3 | 7.7 | 7.7 | 11.4 | 12.2 | 13.4 | 13.5 | 12.2 | 11.4 | 9.2 | 8.0 | 5.4 |
| Precipitation (mm) | 234 | 58 | 163 | 7 | 18 | 1 | 0 | 2 | 9 | 10 | 32 | 95 |
| Sunny days | 12 | 16 | 14 | 27 | 22 | 27 | 31 | 30 | 27 | 25 | 21 | 18 |
| Rainy days | 19 | 12 | 17 | 3 | 9 | 3 | 0 | 1 | 3 | 6 | 9 | 13 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Colusa County during the most sunny months:
The largest precipitation sum in Colusa County is at