Average annual temperature is 15.1 °C
Absolute maximum temperature: 41.8 °C
Absolute minimum temperature: -1.9 °C
Number of sunny days: 249 days
Number of rainy days: 116 days
Look at detailed online map of Clearlake
* Weather data for Clearlake 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) | 18.6 | 21.5 | 16.7 | 31.4 | 31.8 | 39.1 | 41.8 | 41.1 | 35.9 | 33.2 | 25.0 | 18.9 |
| Average daytime temperature (°C) | 12.2 | 12.8 | 11.1 | 19.6 | 24.6 | 29.6 | 36.2 | 34.6 | 29.1 | 25.2 | 17.8 | 14.4 |
| Average temperature (°C) | 7.4 | 6.4 | 6.2 | 11.8 | 17.1 | 21.0 | 26.3 | 25.6 | 20.8 | 17.1 | 11.7 | 9.3 |
| Average night temperature (°C) | 4.1 | 2.3 | 3.1 | 6.6 | 11.2 | 13.9 | 17.3 | 18.1 | 14.4 | 11.8 | 7.3 | 6.1 |
| Absolute minimum temperature (°C) | -1.9 | -1.0 | -0.6 | 0.1 | 5.2 | 8.0 | 11.6 | 13.9 | 10.3 | 5.4 | 2.0 | 2.3 |
| 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) | 9.8 | 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) | 5.6 | 7.6 | 7.6 | 11.1 | 12.1 | 13.5 | 13.5 | 12.3 | 11.3 | 8.8 | 7.5 | 5.0 |
| Precipitation (mm) | 314 | 106 | 225 | 10 | 27 | 1 | 0 | 1 | 6 | 18 | 62 | 155 |
| Sunny days | 12 | 14 | 10 | 27 | 22 | 24 | 31 | 28 | 24 | 23 | 19 | 15 |
| Rainy days | 19 | 14 | 21 | 3 | 9 | 6 | 0 | 3 | 6 | 8 | 11 | 16 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Clearlake during the most sunny months:
The largest precipitation sum in Clearlake is at