Average annual temperature is 22.8 °C
Absolute maximum temperature: 35.9 °C
Absolute minimum temperature: 1.6 °C
Number of sunny days: 138 days
Number of rainy days: 227 days
Look at detailed online map of Rock Lake
* Weather data for Rock Lake 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) | 27.4 | 29.6 | 32.3 | 34.8 | 34.7 | 34.7 | 34.4 | 35.9 | 33.6 | 31.6 | 31.6 | 28.6 |
| Average daytime temperature (°C) | 21.9 | 25.6 | 26.9 | 29.6 | 30.5 | 30.5 | 32.6 | 33.4 | 31.8 | 28.4 | 25.3 | 21.8 |
| Average temperature (°C) | 16.3 | 19.7 | 21.0 | 23.7 | 24.5 | 26.1 | 27.9 | 28.5 | 26.4 | 23.2 | 19.7 | 17.0 |
| Average night temperature (°C) | 12.2 | 15.3 | 16.4 | 19.2 | 19.7 | 22.7 | 24.4 | 24.8 | 22.5 | 19.1 | 15.6 | 13.7 |
| Absolute minimum temperature (°C) | 1.6 | 7.6 | 6.7 | 12.5 | 15.6 | 20.1 | 22.8 | 22.6 | 18.9 | 10.7 | 6.2 | 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 | 13.0 | 13.0 | 13.0 | 13.0 | 12.0 | 11.0 | 11.0 | 10.0 |
| Daylight mean duration (h) | 10.6 | 11.2 | 12.0 | 12.8 | 13.5 | 13.9 | 13.7 | 13.1 | 12.3 | 11.5 | 10.8 | 10.4 |
| Daylight minimum duration (h) | 10.0 | 10.0 | 11.0 | 12.0 | 13.0 | 13.0 | 13.0 | 12.0 | 11.0 | 11.0 | 10.0 | 10.0 |
| Sunshine mean duration (h) | 8.5 | 9.5 | 10.1 | 10.1 | 11.9 | 11.2 | 11.0 | 11.1 | 10.5 | 9.6 | 7.6 | 7.1 |
| Precipitation (mm) | 38 | 24 | 46 | 65 | 102 | 238 | 137 | 141 | 129 | 39 | 38 | 106 |
| Sunny days | 19 | 18 | 12 | 8 | 12 | 3 | 2 | 2 | 6 | 20 | 16 | 20 |
| Rainy days | 12 | 10 | 19 | 22 | 19 | 27 | 29 | 29 | 24 | 11 | 14 | 11 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Rock Lake is at