Average annual temperature is 10.8 °C
Absolute maximum temperature: 36.4 °C
Absolute minimum temperature: -23.2 °C
Number of sunny days: 183 days
Number of rainy days: 158 days
Number of snow days: 24 days
Look at detailed online map of McHenry
* Weather data for McHenry 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) | 9.9 | 13.7 | 20.1 | 26.3 | 31.4 | 32.6 | 32.6 | 36.4 | 33.6 | 27.8 | 19.1 | 13.7 |
| Average daytime temperature (°C) | 2.2 | 4.4 | 7.1 | 15.5 | 22.0 | 27.3 | 28.1 | 27.3 | 23.9 | 16.3 | 9.0 | 5.9 |
| Average temperature (°C) | -1.4 | -0.8 | 2.0 | 9.3 | 15.3 | 20.7 | 22.8 | 22.1 | 19.2 | 12.3 | 4.5 | 2.6 |
| Average night temperature (°C) | -3.8 | -4.7 | -1.7 | 4.2 | 10.1 | 15.3 | 18.2 | 18.0 | 15.8 | 9.0 | 1.1 | 0.4 |
| Absolute minimum temperature (°C) | -23.2 | -21.7 | -11.8 | -1.8 | 1.2 | 7.8 | 14.2 | 12.5 | 10.8 | -2.3 | -11.1 | -7.8 |
| 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 | 9.1 |
| 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 | 7.4 | 6.6 | 8.6 | 10.7 | 12.0 | 11.7 | 10.8 | 8.2 | 6.8 | 6.9 | 3.7 |
| Precipitation (mm) | 63 | 87 | 86 | 117 | 61 | 27 | 111 | 128 | 93 | 78 | 31 | 60 |
| Sunny days | 10 | 17 | 11 | 15 | 22 | 21 | 12 | 17 | 10 | 12 | 21 | 15 |
| Rainy days | 10 | 9 | 15 | 15 | 9 | 9 | 19 | 14 | 20 | 18 | 7 | 13 |
| Snow days | 11 | 2 | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 3 |
The best time to visit McHenry during the most sunny months:
The largest precipitation sum in McHenry is at