Average annual temperature is 9.6 °C
Absolute maximum temperature: 35.9 °C
Absolute minimum temperature: -25.1 °C
Number of sunny days: 198 days
Number of rainy days: 137 days
Number of snow days: 30 days
Look at detailed online map of Town of Crystal Lake
* Weather data for Town of Crystal 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) | 6.0 | 8.8 | 11.1 | 26.3 | 31.1 | 33.0 | 33.3 | 35.9 | 33.9 | 28.8 | 16.4 | 11.4 |
| Average daytime temperature (°C) | -0.1 | 1.8 | 5.1 | 14.3 | 22.0 | 27.6 | 28.3 | 27.3 | 24.0 | 15.2 | 7.4 | 4.8 |
| Average temperature (°C) | -3.7 | -3.4 | -0.3 | 7.8 | 14.9 | 21.1 | 22.5 | 21.6 | 18.5 | 11.0 | 2.7 | 1.1 |
| Average night temperature (°C) | -6.5 | -7.8 | -4.6 | 2.7 | 8.6 | 14.6 | 16.7 | 16.7 | 14.2 | 7.2 | -0.9 | -1.7 |
| Absolute minimum temperature (°C) | -25.1 | -24.4 | -14.2 | -5.1 | -0.3 | 6.7 | 12.0 | 9.7 | 6.2 | -4.1 | -12.8 | -8.5 |
| 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) | 9.3 | 10.5 | 11.9 | 13.5 | 14.7 | 15.4 | 15.1 | 14.0 | 12.5 | 11.0 | 9.7 | 9.0 |
| Daylight minimum duration (h) | 8.0 | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 8.0 |
| Sunshine mean duration (h) | 4.0 | 6.5 | 7.1 | 7.9 | 10.4 | 12.6 | 12.7 | 11.5 | 8.8 | 6.3 | 6.5 | 4.6 |
| Precipitation (mm) | 44 | 64 | 71 | 95 | 37 | 35 | 44 | 95 | 82 | 96 | 12 | 38 |
| Sunny days | 15 | 15 | 14 | 12 | 19 | 21 | 14 | 21 | 14 | 13 | 22 | 18 |
| Rainy days | 7 | 6 | 11 | 17 | 12 | 9 | 17 | 10 | 16 | 16 | 7 | 9 |
| Snow days | 9 | 7 | 6 | 1 | 0 | 0 | 0 | 0 | 0 | 2 | 1 | 4 |
The best time to visit Town of Crystal Lake during the most sunny months:
Months with the longest average daylight duration in Town of Crystal Lake:
The largest precipitation sum in Town of Crystal Lake is at