Average annual temperature is 11.1 °C
Absolute maximum temperature: 37.0 °C
Absolute minimum temperature: -21.4 °C
Number of sunny days: 182 days
Number of rainy days: 169 days
Number of snow days: 14 days
Look at detailed online map of Oak Brook
* Weather data for Oak Brook 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) | 11.5 | 14.7 | 20.7 | 25.8 | 31.5 | 33.1 | 32.4 | 37.0 | 34.1 | 27.9 | 19.9 | 15.1 |
| Average daytime temperature (°C) | 3.3 | 5.8 | 7.8 | 16.5 | 21.6 | 27.2 | 28.0 | 27.2 | 24.2 | 16.9 | 9.8 | 6.7 |
| Average temperature (°C) | -0.4 | 0.5 | 2.8 | 9.8 | 15.2 | 20.5 | 22.5 | 22.1 | 19.2 | 12.6 | 5.0 | 3.3 |
| Average night temperature (°C) | -3.3 | -3.5 | -0.8 | 4.2 | 9.6 | 14.8 | 17.9 | 17.8 | 15.1 | 9.1 | 1.2 | 0.8 |
| Absolute minimum temperature (°C) | -21.4 | -18.5 | -11.2 | -3.4 | 1.5 | 7.6 | 13.6 | 11.9 | 9.2 | -3.0 | -10.5 | -7.8 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 9.0 | 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) | 9.5 | 10.6 | 11.9 | 13.4 | 14.6 | 15.2 | 14.9 | 13.8 | 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) | 3.1 | 7.7 | 6.5 | 9.1 | 10.5 | 11.7 | 11.4 | 10.4 | 7.9 | 6.2 | 7.1 | 4.0 |
| Precipitation (mm) | 63 | 85 | 76 | 96 | 55 | 48 | 340 | 130 | 120 | 101 | 46 | 74 |
| Sunny days | 13 | 17 | 11 | 16 | 20 | 19 | 13 | 15 | 12 | 10 | 21 | 15 |
| Rainy days | 10 | 8 | 20 | 14 | 11 | 11 | 18 | 16 | 18 | 20 | 8 | 15 |
| Snow days | 8 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 |
The best time to visit Oak Brook during the most sunny months:
The largest precipitation sum in Oak Brook is at