Average annual temperature is 14.5 °C
Absolute maximum temperature: 40.3 °C
Absolute minimum temperature: -2.0 °C
Number of sunny days: 244 days
Number of rainy days: 119 days
Number of snow days: 2 days
Look at detailed online map of Upper Lake
* Weather data for Upper Lake 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) | 19.5 | 21.1 | 16.2 | 30.7 | 31.4 | 37.7 | 40.3 | 39.5 | 35.7 | 32.1 | 23.9 | 18.2 |
| Average daytime temperature (°C) | 12.2 | 12.4 | 10.6 | 18.7 | 23.1 | 27.7 | 34.5 | 33.3 | 27.8 | 24.4 | 17.3 | 13.9 |
| Average temperature (°C) | 7.0 | 6.1 | 6.0 | 11.4 | 16.1 | 19.8 | 25.3 | 24.7 | 19.9 | 16.3 | 11.1 | 9.1 |
| Average night temperature (°C) | 3.5 | 2.2 | 3.0 | 6.2 | 10.7 | 13.4 | 17.1 | 17.6 | 14.0 | 11.0 | 6.9 | 6.1 |
| Absolute minimum temperature (°C) | -2.0 | -1.3 | -1.3 | -0.5 | 4.6 | 7.6 | 12.3 | 14.1 | 10.5 | 4.2 | 1.1 | 1.4 |
| 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 | 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) | 5.4 | 7.1 | 7.1 | 10.7 | 11.9 | 13.5 | 13.5 | 12.0 | 11.0 | 8.7 | 7.7 | 5.1 |
| Precipitation (mm) | 387 | 114 | 253 | 21 | 42 | 2 | 0 | 1 | 15 | 29 | 85 | 214 |
| Sunny days | 12 | 14 | 9 | 23 | 22 | 27 | 31 | 29 | 24 | 21 | 17 | 15 |
| Rainy days | 19 | 12 | 22 | 7 | 9 | 3 | 0 | 2 | 6 | 10 | 13 | 16 |
| Snow days | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Upper Lake during the most sunny months:
The largest precipitation sum in Upper Lake is at