Average annual temperature is 8.7 °C
Absolute maximum temperature: 37.0 °C
Absolute minimum temperature: -16.6 °C
Number of sunny days: 190 days
Number of rainy days: 121 days
Number of snow days: 54 days
Look at detailed online map of Chelan County
* Weather data for Chelan 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) | 6.3 | 8.3 | 10.9 | 24.1 | 28.4 | 30.7 | 33.1 | 37.0 | 30.4 | 23.7 | 12.3 | 7.9 |
| Average daytime temperature (°C) | 3.2 | 3.5 | 5.9 | 10.1 | 20.8 | 23.5 | 28.3 | 28.5 | 22.0 | 15.6 | 7.2 | 4.1 |
| Average temperature (°C) | 0.1 | -0.9 | 1.3 | 4.6 | 13.1 | 16.2 | 20.2 | 20.5 | 15.0 | 9.6 | 3.2 | 0.9 |
| Average night temperature (°C) | -2.1 | -3.7 | -2.1 | 0.7 | 6.4 | 9.2 | 12.7 | 13.8 | 9.8 | 5.5 | 0.8 | -2.0 |
| Absolute minimum temperature (°C) | -12.5 | -16.6 | -8.7 | -5.4 | 0.6 | 4.1 | 9.2 | 9.0 | 2.7 | -2.2 | -3.2 | -9.9 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 9.0 | 10.0 | 12.0 | 14.0 | 15.0 | 16.0 | 15.0 | 14.0 | 13.0 | 11.0 | 9.0 | 8.0 |
| Daylight mean duration (h) | 8.9 | 10.2 | 11.9 | 13.7 | 15.2 | 15.9 | 15.6 | 14.2 | 12.6 | 10.8 | 9.3 | 8.5 |
| Daylight minimum duration (h) | 8.0 | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 15.0 | 13.0 | 11.0 | 10.0 | 8.0 | 8.0 |
| Sunshine mean duration (h) | 3.7 | 5.3 | 7.4 | 8.4 | 12.9 | 13.0 | 13.9 | 12.3 | 10.0 | 7.6 | 5.1 | 2.8 |
| Precipitation (mm) | 78 | 94 | 67 | 68 | 18 | 25 | 1 | 4 | 56 | 40 | 134 | 188 |
| Sunny days | 12 | 7 | 10 | 11 | 17 | 19 | 27 | 25 | 20 | 18 | 16 | 8 |
| Rainy days | 8 | 10 | 7 | 13 | 14 | 11 | 4 | 6 | 10 | 12 | 13 | 13 |
| Snow days | 11 | 11 | 14 | 6 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 10 |
The best time to visit Chelan County during the most sunny months:
Months with the longest average daylight duration in Chelan County:
The largest precipitation sum in Chelan County is at