Average annual temperature is 10.7 °C
Absolute maximum temperature: 35.0 °C
Absolute minimum temperature: -16.9 °C
Number of sunny days: 160 days
Number of rainy days: 176 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) | 8.9 | 12.5 | 16.7 | 26.5 | 33.7 | 35.0 | 32.0 | 30.5 | 32.0 | 28.4 | 16.5 | 14.1 |
| Average daytime temperature (°C) | 2.7 | 3.7 | 6.7 | 15.1 | 22.4 | 27.5 | 27.3 | 26.0 | 23.3 | 15.8 | 8.4 | 6.4 |
| Average temperature (°C) | -0.1 | -0.7 | 2.0 | 8.8 | 15.5 | 20.9 | 22.1 | 20.6 | 18.3 | 11.8 | 4.4 | 3.6 |
| Average night temperature (°C) | -2.3 | -4.7 | -1.7 | 3.8 | 9.3 | 14.9 | 17.3 | 16.3 | 14.3 | 8.8 | 1.0 | 1.5 |
| Absolute minimum temperature (°C) | -16.9 | -15.6 | -9.1 | -4.1 | 1.9 | 9.3 | 13.7 | 9.9 | 7.8 | 1.1 | -8.5 | -3.5 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.4 | 10.5 | 11.9 | 13.4 | 14.7 | 15.3 | 15.0 | 13.9 | 12.5 | 11.0 | 9.8 | 9.1 |
| Daylight minimum duration (h) | 9.0 | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 3.1 | 6.0 | 6.6 | 8.9 | 10.5 | 11.8 | 12.2 | 10.7 | 8.5 | 5.4 | 5.8 | 3.1 |
| Precipitation (mm) | 64 | 111 | 101 | 83 | 44 | 41 | 110 | 194 | 38 | 110 | 72 | 50 |
| Sunny days | 8 | 13 | 9 | 13 | 20 | 18 | 8 | 18 | 15 | 8 | 17 | 13 |
| Rainy days | 13 | 9 | 15 | 16 | 11 | 12 | 23 | 13 | 15 | 23 | 9 | 17 |
| Snow days | 10 | 6 | 7 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 4 | 1 |
The best time to visit Grand Valley during the most sunny months:
Months with the longest average daylight duration in Grand Valley:
The largest precipitation sum in Grand Valley is at