Average annual temperature is 10.5 °C
Absolute maximum temperature: 36.9 °C
Absolute minimum temperature: -26.5 °C
Number of sunny days: 185 days
Number of rainy days: 156 days
Number of snow days: 24 days
Look at detailed online map of Rock County
* Weather data for Rock County 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) | 9.3 | 10.7 | 19.6 | 25.5 | 32.5 | 32.9 | 33.4 | 36.9 | 33.7 | 27.5 | 18.4 | 13.0 |
| Average daytime temperature (°C) | 1.6 | 3.7 | 6.6 | 15.4 | 23.0 | 28.0 | 28.7 | 28.0 | 24.3 | 16.0 | 8.5 | 5.6 |
| Average temperature (°C) | -2.1 | -1.8 | 1.4 | 9.0 | 15.8 | 21.3 | 23.1 | 22.3 | 19.2 | 11.7 | 3.8 | 2.1 |
| Average night temperature (°C) | -4.8 | -5.8 | -2.9 | 3.5 | 9.7 | 15.1 | 17.7 | 17.6 | 15.3 | 8.1 | 0.2 | -0.4 |
| Absolute minimum temperature (°C) | -26.5 | -23.0 | -13.0 | -2.5 | 0.6 | 7.0 | 13.1 | 10.0 | 8.4 | -2.6 | -12.1 | -7.9 |
| 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) | 9.5 | 10.6 | 11.9 | 13.4 | 14.6 | 15.3 | 15.0 | 13.9 | 12.5 | 11.1 | 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) | 3.6 | 7.1 | 6.4 | 8.6 | 10.8 | 12.2 | 12.3 | 11.1 | 8.5 | 7.1 | 6.7 | 4.1 |
| Precipitation (mm) | 62 | 90 | 93 | 119 | 59 | 23 | 101 | 51 | 117 | 113 | 47 | 60 |
| Sunny days | 12 | 16 | 13 | 15 | 22 | 19 | 17 | 15 | 12 | 10 | 21 | 13 |
| Rainy days | 12 | 8 | 12 | 15 | 9 | 11 | 14 | 16 | 18 | 19 | 9 | 13 |
| Snow days | 7 | 4 | 6 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 5 |
The best time to visit Rock County during the most sunny months:
Months with the longest average daylight duration in Rock County:
The largest precipitation sum in Rock County is at