Average annual temperature is 11.2 °C
Absolute maximum temperature: 36.0 °C
Absolute minimum temperature: -18.5 °C
Number of sunny days: 183 days
Number of rainy days: 167 days
Number of snow days: 15 days
Look at detailed online map of Oak Forest
* Weather data for Oak Forest 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) | 13.2 | 14.1 | 21.0 | 25.3 | 31.4 | 32.2 | 32.7 | 36.0 | 33.1 | 27.6 | 19.8 | 14.5 |
| Average daytime temperature (°C) | 3.4 | 6.1 | 7.9 | 16.4 | 21.8 | 26.9 | 28.0 | 26.9 | 23.9 | 16.9 | 10.1 | 6.8 |
| Average temperature (°C) | -0.3 | 0.9 | 2.8 | 9.9 | 15.4 | 20.4 | 22.5 | 21.8 | 19.1 | 12.6 | 5.1 | 3.4 |
| Average night temperature (°C) | -3.1 | -3.0 | -0.8 | 4.3 | 10.2 | 14.9 | 17.8 | 17.8 | 15.2 | 9.3 | 1.1 | 0.9 |
| Absolute minimum temperature (°C) | -18.5 | -17.0 | -11.3 | -3.4 | 1.7 | 8.2 | 13.1 | 11.7 | 10.3 | -2.9 | -10.3 | -7.9 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.6 | 10.6 | 11.9 | 13.3 | 14.5 | 15.1 | 14.8 | 13.8 | 12.5 | 11.1 | 9.9 | 9.2 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 14.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 3.0 | 7.7 | 6.4 | 9.3 | 10.5 | 11.9 | 11.5 | 10.6 | 8.1 | 6.3 | 7.2 | 3.9 |
| Precipitation (mm) | 78 | 90 | 124 | 70 | 54 | 48 | 205 | 159 | 117 | 129 | 38 | 77 |
| Sunny days | 11 | 18 | 12 | 16 | 20 | 18 | 13 | 15 | 13 | 10 | 23 | 14 |
| Rainy days | 11 | 8 | 18 | 14 | 11 | 12 | 18 | 16 | 17 | 20 | 6 | 16 |
| Snow days | 9 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 |
The best time to visit Oak Forest during the most sunny months:
The largest precipitation sum in Oak Forest is at