Average annual temperature is 16.4 °C
Absolute maximum temperature: 35.9 °C
Absolute minimum temperature: -4.6 °C
Number of sunny days: 202 days
Number of rainy days: 163 days
Look at detailed online map of River Forest
* Weather data for River 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) | 19.2 | 24.6 | 25.6 | 28.7 | 29.7 | 31.5 | 35.2 | 35.9 | 35.3 | 28.4 | 27.4 | 21.0 |
| Average daytime temperature (°C) | 13.0 | 16.0 | 17.4 | 22.0 | 24.5 | 28.2 | 32.4 | 31.4 | 28.6 | 23.3 | 17.0 | 12.9 |
| Average temperature (°C) | 8.1 | 10.9 | 11.5 | 15.6 | 18.7 | 22.1 | 26.2 | 25.4 | 22.3 | 17.0 | 10.9 | 7.6 |
| Average night temperature (°C) | 4.1 | 6.6 | 6.1 | 9.7 | 13.8 | 16.9 | 20.9 | 20.6 | 17.1 | 11.7 | 6.2 | 3.2 |
| Absolute minimum temperature (°C) | -4.3 | -4.0 | -4.0 | 3.0 | 5.8 | 12.3 | 18.0 | 18.1 | 13.2 | 6.0 | -4.1 | -4.6 |
| 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 | 13.0 | 12.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 10.1 | 10.9 | 12.0 | 13.1 | 14.0 | 14.5 | 14.2 | 13.4 | 12.4 | 11.3 | 10.3 | 9.8 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 6.3 | 6.3 | 8.2 | 8.9 | 9.8 | 10.7 | 12.1 | 10.6 | 10.4 | 9.5 | 7.6 | 6.5 |
| Precipitation (mm) | 139 | 78 | 90 | 160 | 75 | 148 | 57 | 84 | 61 | 18 | 45 | 132 |
| Sunny days | 17 | 11 | 18 | 15 | 14 | 14 | 13 | 14 | 18 | 26 | 22 | 20 |
| Rainy days | 14 | 17 | 13 | 15 | 17 | 16 | 18 | 17 | 12 | 5 | 8 | 11 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit River Forest during the most sunny months:
The largest precipitation sum in River Forest is at