Average annual temperature is 9.9 °C
Absolute maximum temperature: 31.3 °C
Absolute minimum temperature: -16.2 °C
Number of sunny days: 131 days
Number of rainy days: 205 days
Number of snow days: 29 days
Look at detailed online map of Grand Valley
* Weather data for Grand Valley 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) | 13.9 | 17.4 | 16.1 | 27.3 | 31.0 | 31.3 | 30.3 | 31.2 | 30.5 | 26.5 | 15.7 | 13.6 |
| Average daytime temperature (°C) | 4.3 | 7.6 | 6.7 | 16.2 | 20.3 | 23.2 | 26.5 | 24.5 | 22.1 | 15.6 | 8.4 | 6.5 |
| Average temperature (°C) | 0.8 | 0.7 | 1.4 | 9.3 | 13.4 | 17.6 | 21.0 | 19.3 | 16.8 | 11.4 | 3.9 | 3.1 |
| Average night temperature (°C) | -1.8 | -4.0 | -2.6 | 3.9 | 7.4 | 12.7 | 16.5 | 15.3 | 12.8 | 8.0 | 0.6 | 0.7 |
| Absolute minimum temperature (°C) | -10.0 | -16.2 | -11.8 | -5.2 | 0.5 | 8.4 | 13.1 | 10.6 | 7.8 | -0.2 | -8.3 | -6.3 |
| 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 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.5 | 10.6 | 11.9 | 13.3 | 14.5 | 15.2 | 14.9 | 13.8 | 12.5 | 11.1 | 9.9 | 9.2 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 14.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 2.1 | 5.9 | 5.9 | 8.3 | 10.8 | 10.7 | 11.6 | 10.4 | 8.9 | 5.7 | 5.8 | 3.4 |
| Precipitation (mm) | 144 | 75 | 117 | 89 | 49 | 141 | 170 | 151 | 34 | 68 | 77 | 95 |
| Sunny days | 6 | 9 | 8 | 15 | 22 | 11 | 3 | 7 | 12 | 11 | 15 | 12 |
| Rainy days | 16 | 14 | 15 | 14 | 9 | 19 | 28 | 24 | 18 | 20 | 12 | 16 |
| Snow days | 9 | 5 | 8 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 3 |
The best time to visit Grand Valley during the most sunny months:
The largest precipitation sum in Grand Valley is at