Average annual temperature is 12.0 °C
Absolute maximum temperature: 41.5 °C
Absolute minimum temperature: -11.5 °C
Number of sunny days: 232 days
Number of rainy days: 109 days
Number of snow days: 24 days
Look at detailed online map of Coulee Dam
* Weather data for Coulee Dam 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) | 8.2 | 11.9 | 14.8 | 28.6 | 33.7 | 34.4 | 37.1 | 41.5 | 31.8 | 26.7 | 11.8 | 8.2 |
| Average daytime temperature (°C) | 2.9 | 5.6 | 9.3 | 14.5 | 26.3 | 28.5 | 33.3 | 32.8 | 25.4 | 17.5 | 7.3 | 4.6 |
| Average temperature (°C) | -0.4 | 0.4 | 3.5 | 9.0 | 19.5 | 22.0 | 26.5 | 26.0 | 19.0 | 11.6 | 3.5 | 1.8 |
| Average night temperature (°C) | -2.7 | -2.8 | -1.3 | 4.0 | 13.1 | 15.5 | 19.3 | 19.1 | 13.5 | 6.8 | 0.6 | -0.1 |
| Absolute minimum temperature (°C) | -11.5 | -11.0 | -7.0 | -1.6 | 7.7 | 9.2 | 13.8 | 14.1 | 6.0 | -4.3 | -3.4 | -4.1 |
| 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 | 15.0 | 13.0 | 11.0 | 9.0 | 8.0 |
| Daylight mean duration (h) | 8.9 | 10.2 | 11.9 | 13.7 | 15.2 | 16.0 | 15.6 | 14.3 | 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) | 3.8 | 6.2 | 8.3 | 9.3 | 12.5 | 13.3 | 13.8 | 11.5 | 9.9 | 7.8 | 4.7 | 2.7 |
| Precipitation (mm) | 43 | 21 | 19 | 48 | 21 | 18 | 3 | 15 | 12 | 47 | 40 | 61 |
| Sunny days | 14 | 18 | 14 | 9 | 19 | 24 | 29 | 27 | 23 | 22 | 20 | 13 |
| Rainy days | 12 | 7 | 9 | 19 | 12 | 6 | 2 | 4 | 7 | 9 | 10 | 12 |
| Snow days | 5 | 3 | 8 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 6 |
The best time to visit Coulee Dam during the most sunny months:
Months with the longest average daylight duration in Coulee Dam:
The largest precipitation sum in Coulee Dam is at