Average annual temperature is 13.3 °C
Absolute maximum temperature: 36.3 °C
Absolute minimum temperature: -10.4 °C
Number of sunny days: 189 days
Number of rainy days: 172 days
Number of snow days: 4 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) | 15.9 | 22.5 | 23.3 | 31.6 | 29.9 | 34.1 | 36.1 | 34.4 | 36.3 | 28.0 | 22.1 | 16.8 |
| Average daytime temperature (°C) | 8.4 | 11.5 | 12.1 | 21.5 | 23.1 | 27.3 | 32.4 | 30.5 | 26.0 | 20.0 | 12.5 | 9.5 |
| Average temperature (°C) | 4.1 | 4.9 | 5.7 | 13.7 | 16.0 | 20.5 | 25.4 | 23.6 | 19.8 | 14.2 | 6.4 | 4.7 |
| Average night temperature (°C) | 1.0 | 0.0 | 0.7 | 7.1 | 9.4 | 14.3 | 19.4 | 18.1 | 14.7 | 9.4 | 1.8 | 1.3 |
| Absolute minimum temperature (°C) | -4.2 | -10.4 | -6.5 | -0.5 | 3.9 | 9.7 | 16.6 | 13.9 | 9.6 | 2.6 | -6.0 | -4.0 |
| 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) | 9.7 | 10.7 | 12.0 | 13.3 | 14.4 | 14.9 | 14.7 | 13.7 | 12.5 | 11.2 | 10.0 | 9.4 |
| 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) | 4.7 | 7.2 | 7.7 | 9.0 | 10.6 | 10.9 | 12.1 | 11.2 | 9.0 | 7.8 | 7.6 | 5.0 |
| Precipitation (mm) | 67 | 38 | 81 | 79 | 38 | 92 | 46 | 65 | 108 | 42 | 59 | 98 |
| Sunny days | 12 | 20 | 13 | 16 | 18 | 14 | 10 | 12 | 17 | 17 | 25 | 15 |
| Rainy days | 18 | 6 | 18 | 14 | 13 | 16 | 21 | 19 | 13 | 14 | 5 | 15 |
| Snow days | 1 | 2 | 0 | 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