Average annual temperature is 5.7 °C
Absolute maximum temperature: 33.7 °C
Absolute minimum temperature: -30.7 °C
Number of sunny days: 174 days
Number of rainy days: 120 days
Number of snow days: 71 days
Look at detailed online map of Rock River
* Weather data for Rock River 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) | 4.9 | 4.2 | 5.9 | 17.2 | 23.6 | 28.5 | 33.7 | 32.5 | 28.1 | 23.7 | 15.3 | 12.5 |
| Average daytime temperature (°C) | -3.7 | -1.7 | -0.9 | 5.8 | 17.7 | 21.0 | 28.3 | 26.2 | 22.6 | 13.7 | 7.4 | 2.2 |
| Average temperature (°C) | -7.0 | -6.8 | -5.6 | 0.4 | 11.2 | 14.6 | 20.4 | 19.0 | 15.1 | 7.0 | 2.0 | -2.4 |
| Average night temperature (°C) | -10.3 | -10.7 | -9.7 | -3.9 | 4.9 | 8.6 | 12.9 | 12.5 | 8.4 | 1.7 | -1.8 | -6.2 |
| Absolute minimum temperature (°C) | -24.4 | -30.7 | -16.8 | -13.7 | -0.3 | 3.7 | 8.9 | 6.9 | 3.0 | -11.2 | -13.7 | -17.2 |
| 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) | 5.7 | 8.1 | 9.7 | 10.5 | 11.2 | 11.8 | 12.7 | 11.6 | 10.9 | 8.7 | 7.6 | 7.0 |
| Precipitation (mm) | 48 | 30 | 21 | 45 | 47 | 83 | 33 | 42 | 15 | 38 | 11 | 9 |
| Sunny days | 12 | 14 | 12 | 13 | 7 | 7 | 17 | 11 | 17 | 20 | 24 | 20 |
| Rainy days | 2 | 2 | 3 | 8 | 24 | 23 | 14 | 20 | 13 | 8 | 3 | 0 |
| Snow days | 17 | 12 | 16 | 9 | 0 | 0 | 0 | 0 | 0 | 3 | 3 | 11 |
The best time to visit Rock River during the most sunny months:
The largest precipitation sum in Rock River is at