Average annual temperature is 11.4 °C
Absolute maximum temperature: 33.2 °C
Absolute minimum temperature: -11.6 °C
Number of sunny days: 145 days
Number of rainy days: 201 days
Number of snow days: 19 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) | 14.8 | 20.5 | 18.2 | 28.4 | 32.3 | 33.2 | 32.3 | 30.7 | 32.2 | 27.6 | 17.7 | 15.1 |
| Average daytime temperature (°C) | 5.9 | 9.9 | 8.8 | 17.5 | 21.9 | 25.5 | 28.3 | 26.7 | 24.0 | 17.1 | 10.0 | 7.8 |
| Average temperature (°C) | 2.0 | 2.5 | 3.2 | 10.6 | 14.9 | 19.4 | 22.5 | 20.8 | 18.3 | 12.6 | 5.1 | 4.2 |
| Average night temperature (°C) | -0.9 | -2.1 | -0.8 | 5.0 | 8.5 | 14.0 | 17.8 | 16.3 | 13.8 | 8.9 | 1.5 | 1.4 |
| Absolute minimum temperature (°C) | -7.9 | -11.6 | -7.2 | -3.1 | 1.7 | 9.3 | 13.6 | 11.7 | 8.6 | 0.7 | -7.4 | -6.1 |
| 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 | 9.3 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 2.8 | 6.3 | 5.9 | 8.3 | 10.9 | 11.4 | 11.8 | 10.9 | 8.8 | 6.6 | 6.2 | 3.5 |
| Precipitation (mm) | 130 | 61 | 124 | 81 | 52 | 141 | 129 | 99 | 64 | 62 | 55 | 76 |
| Sunny days | 7 | 7 | 9 | 15 | 21 | 14 | 8 | 7 | 14 | 14 | 19 | 10 |
| Rainy days | 17 | 17 | 17 | 15 | 10 | 16 | 23 | 24 | 16 | 17 | 10 | 19 |
| Snow days | 7 | 4 | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 |
The best time to visit Oak Forest during the most sunny months:
The largest precipitation sum in Oak Forest is at