Average annual temperature is 11.2 °C
Absolute maximum temperature: 36.7 °C
Absolute minimum temperature: -21.0 °C
Number of sunny days: 184 days
Number of rainy days: 167 days
Number of snow days: 14 days
Look at detailed online map of Willowbrook
* Weather data for Willowbrook 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) | 12.3 | 14.6 | 20.7 | 25.7 | 31.4 | 32.6 | 33.3 | 36.7 | 33.7 | 27.9 | 19.9 | 15.0 |
| Average daytime temperature (°C) | 3.4 | 6.0 | 7.9 | 16.6 | 21.8 | 27.3 | 28.2 | 27.3 | 24.1 | 17.0 | 9.8 | 6.8 |
| Average temperature (°C) | -0.3 | 0.6 | 2.9 | 9.9 | 15.4 | 20.6 | 22.6 | 22.1 | 19.2 | 12.7 | 5.2 | 3.4 |
| Average night temperature (°C) | -3.1 | -3.3 | -0.7 | 4.3 | 9.9 | 15.0 | 18.1 | 18.0 | 15.3 | 9.3 | 1.4 | 0.9 |
| Absolute minimum temperature (°C) | -21.0 | -18.2 | -11.1 | -3.2 | 1.7 | 7.7 | 13.7 | 12.1 | 9.5 | -2.8 | -10.4 | -7.7 |
| 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 | 13.3 | 14.5 | 15.2 | 14.9 | 13.8 | 12.5 | 11.1 | 9.9 | 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) | 3.2 | 7.7 | 6.3 | 9.0 | 10.5 | 11.6 | 11.3 | 10.5 | 8.0 | 6.2 | 7.2 | 4.1 |
| Precipitation (mm) | 63 | 86 | 92 | 102 | 50 | 47 | 317 | 115 | 125 | 90 | 46 | 71 |
| Sunny days | 12 | 17 | 11 | 17 | 19 | 18 | 13 | 18 | 11 | 10 | 22 | 16 |
| Rainy days | 10 | 9 | 20 | 13 | 12 | 12 | 18 | 13 | 19 | 20 | 7 | 14 |
| Snow days | 9 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 |
The best time to visit Willowbrook during the most sunny months:
The largest precipitation sum in Willowbrook is at