Average annual temperature is 9.7 °C
Absolute maximum temperature: 31.8 °C
Absolute minimum temperature: -23.7 °C
Number of sunny days: 145 days
Number of rainy days: 205 days
Number of snow days: 15 days
Look at detailed online map of Rock Valley
* Weather data for Rock 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) | 15.1 | 14.9 | 15.2 | 29.3 | 29.7 | 31.8 | 30.3 | 28.0 | 30.3 | 26.8 | 16.1 | 12.6 |
| Average daytime temperature (°C) | 4.4 | 5.4 | 6.9 | 16.5 | 19.9 | 23.4 | 26.6 | 24.0 | 21.6 | 16.6 | 8.0 | 6.0 |
| Average temperature (°C) | 1.0 | -0.3 | 1.4 | 9.6 | 12.9 | 17.6 | 21.3 | 19.0 | 16.6 | 11.7 | 2.9 | 2.2 |
| Average night temperature (°C) | -2.0 | -4.8 | -2.8 | 4.3 | 6.5 | 12.7 | 17.0 | 14.9 | 12.7 | 7.8 | -0.8 | -0.2 |
| Absolute minimum temperature (°C) | -9.5 | -23.7 | -8.2 | -4.0 | -0.9 | 7.4 | 12.3 | 8.9 | 5.0 | 1.6 | -6.7 | -6.3 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 9.0 | 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 | 13.4 | 14.6 | 15.2 | 14.9 | 13.8 | 12.5 | 11.1 | 9.8 | 9.2 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 14.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 3.8 | 5.8 | 6.5 | 8.5 | 12.0 | 10.7 | 11.3 | 10.2 | 8.3 | 7.1 | 7.0 | 3.3 |
| Precipitation (mm) | 85 | 57 | 99 | 131 | 47 | 91 | 129 | 194 | 96 | 63 | 63 | 148 |
| Sunny days | 11 | 10 | 9 | 14 | 21 | 9 | 5 | 10 | 13 | 16 | 16 | 11 |
| Rainy days | 17 | 13 | 19 | 16 | 10 | 21 | 26 | 21 | 17 | 15 | 13 | 17 |
| Snow days | 3 | 5 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 3 |
The best time to visit Rock Valley during the most sunny months:
The largest precipitation sum in Rock Valley is at