Average annual temperature is 13.3 °C
Absolute maximum temperature: 34.7 °C
Absolute minimum temperature: -10.1 °C
Number of sunny days: 189 days
Number of rainy days: 170 days
Number of snow days: 6 days
Look at detailed online map of Forest Park
* Weather data for Forest Park 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) | 17.3 | 21.4 | 23.1 | 27.4 | 29.5 | 32.7 | 34.7 | 34.5 | 32.2 | 29.7 | 25.4 | 16.0 |
| Average daytime temperature (°C) | 7.3 | 11.8 | 12.2 | 18.9 | 23.5 | 27.7 | 30.1 | 28.7 | 26.5 | 20.1 | 13.3 | 9.3 |
| Average temperature (°C) | 3.5 | 5.1 | 6.0 | 11.8 | 17.3 | 21.5 | 24.3 | 23.2 | 20.5 | 14.4 | 7.3 | 4.7 |
| Average night temperature (°C) | 0.3 | 0.2 | 1.3 | 5.9 | 11.3 | 16.0 | 19.4 | 18.3 | 15.3 | 10.0 | 2.9 | 1.4 |
| Absolute minimum temperature (°C) | -7.5 | -10.1 | -7.4 | -2.0 | 4.1 | 10.8 | 15.8 | 12.6 | 9.9 | -3.5 | -7.5 | -6.8 |
| 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 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.8 | 10.7 | 12.0 | 13.2 | 14.3 | 14.9 | 14.6 | 13.7 | 12.4 | 11.2 | 10.0 | 9.5 |
| 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) | 4.1 | 7.5 | 7.1 | 8.9 | 10.5 | 10.7 | 11.7 | 11.1 | 10.2 | 7.3 | 8.0 | 4.6 |
| Precipitation (mm) | 115 | 52 | 179 | 84 | 62 | 62 | 112 | 99 | 16 | 62 | 23 | 43 |
| Sunny days | 8 | 15 | 14 | 16 | 18 | 18 | 10 | 15 | 20 | 18 | 25 | 12 |
| Rainy days | 21 | 12 | 15 | 14 | 13 | 12 | 21 | 16 | 10 | 13 | 5 | 18 |
| Snow days | 2 | 1 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
The best time to visit Forest Park during the most sunny months:
The largest precipitation sum in Forest Park is at