Average annual temperature is 15.2 °C
Absolute maximum temperature: 39.8 °C
Absolute minimum temperature: -9.3 °C
Number of sunny days: 198 days
Number of rainy days: 165 days
Number of snow days: 2 days
Look at detailed online map of Wheaton
* Weather data for Wheaton 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) | 20.4 | 20.8 | 24.6 | 26.7 | 30.2 | 38.1 | 36.1 | 39.8 | 34.6 | 29.6 | 25.7 | 17.6 |
| Average daytime temperature (°C) | 9.9 | 12.7 | 14.0 | 19.8 | 25.1 | 30.1 | 32.6 | 32.7 | 28.9 | 20.6 | 15.4 | 11.0 |
| Average temperature (°C) | 4.5 | 6.2 | 8.3 | 13.6 | 19.0 | 23.7 | 26.4 | 26.3 | 22.4 | 15.5 | 9.4 | 6.1 |
| Average night temperature (°C) | 0.7 | 1.5 | 3.9 | 8.4 | 14.2 | 18.4 | 21.5 | 21.5 | 17.6 | 11.6 | 5.2 | 2.8 |
| Absolute minimum temperature (°C) | -9.3 | -8.8 | -7.1 | 1.6 | 5.1 | 13.2 | 17.4 | 14.2 | 13.6 | -2.1 | -4.8 | -3.1 |
| 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 | 14.0 | 14.0 | 14.0 | 12.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 10.0 | 10.8 | 12.0 | 13.1 | 14.1 | 14.6 | 14.4 | 13.5 | 12.4 | 11.3 | 10.2 | 9.7 |
| 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) | 5.5 | 6.9 | 7.4 | 9.7 | 10.7 | 12.6 | 11.1 | 11.3 | 10.7 | 7.8 | 7.6 | 5.7 |
| Precipitation (mm) | 66 | 99 | 188 | 69 | 122 | 93 | 68 | 112 | 59 | 68 | 46 | 61 |
| Sunny days | 14 | 18 | 14 | 17 | 14 | 14 | 14 | 20 | 18 | 18 | 20 | 17 |
| Rainy days | 15 | 10 | 17 | 13 | 17 | 16 | 17 | 11 | 12 | 13 | 10 | 14 |
| Snow days | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Wheaton during the most sunny months:
The largest precipitation sum in Wheaton is at