Average annual temperature is 10.8 °C
Absolute maximum temperature: 36.7 °C
Absolute minimum temperature: -24.3 °C
Number of sunny days: 183 days
Number of rainy days: 159 days
Number of snow days: 23 days
Look at detailed online map of Crystal Lake
* Weather data for 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) | 9.8 | 15.0 | 19.8 | 26.0 | 31.2 | 32.5 | 32.8 | 36.7 | 33.8 | 27.8 | 19.0 | 14.0 |
| Average daytime temperature (°C) | 2.3 | 4.5 | 7.2 | 15.7 | 22.1 | 27.3 | 28.2 | 27.4 | 24.1 | 16.2 | 9.1 | 5.9 |
| Average temperature (°C) | -1.4 | -0.7 | 2.1 | 9.3 | 15.4 | 20.6 | 22.7 | 22.1 | 19.1 | 12.2 | 4.5 | 2.6 |
| Average night temperature (°C) | -3.9 | -4.7 | -1.6 | 4.1 | 10.1 | 15.1 | 18.2 | 17.9 | 15.6 | 8.9 | 1.0 | 0.4 |
| Absolute minimum temperature (°C) | -24.3 | -22.1 | -12.1 | -2.2 | 0.9 | 7.5 | 14.1 | 12.5 | 10.5 | -2.4 | -11.4 | -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 | 15.2 | 14.9 | 13.9 | 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) | 3.6 | 7.6 | 6.7 | 8.8 | 10.8 | 12.0 | 11.7 | 10.8 | 8.2 | 6.6 | 7.0 | 3.7 |
| Precipitation (mm) | 59 | 83 | 69 | 92 | 60 | 26 | 142 | 138 | 90 | 76 | 37 | 65 |
| Sunny days | 13 | 17 | 9 | 15 | 21 | 21 | 14 | 14 | 11 | 11 | 22 | 15 |
| Rainy days | 8 | 9 | 15 | 15 | 10 | 9 | 17 | 17 | 19 | 19 | 6 | 15 |
| Snow days | 10 | 2 | 7 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 1 |
The best time to visit Crystal Lake during the most sunny months:
The largest precipitation sum in Crystal Lake is at