Average annual temperature is 4.4 °C
Absolute maximum temperature: 32.1 °C
Absolute minimum temperature: -24.8 °C
Number of sunny days: 204 days
Number of rainy days: 94 days
Number of snow days: 67 days
Look at detailed online map of Saint Charles
* Weather data for Saint Charles 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) | 1.7 | 1.7 | 6.3 | 11.0 | 21.3 | 24.6 | 32.1 | 30.5 | 25.0 | 19.4 | 13.8 | 4.3 |
| Average daytime temperature (°C) | -4.2 | -3.8 | -0.9 | 4.7 | 14.9 | 19.7 | 28.1 | 25.0 | 20.7 | 14.0 | 6.5 | -0.3 |
| Average temperature (°C) | -7.7 | -9.0 | -5.7 | -0.7 | 8.3 | 13.3 | 20.2 | 18.0 | 13.3 | 6.8 | 0.5 | -5.8 |
| Average night temperature (°C) | -10.8 | -13.1 | -9.7 | -5.2 | 1.7 | 6.5 | 12.2 | 11.6 | 6.9 | 1.7 | -3.4 | -10.1 |
| Absolute minimum temperature (°C) | -24.8 | -21.7 | -16.7 | -12.5 | -4.9 | 3.0 | 8.0 | 7.2 | 2.2 | -6.3 | -10.2 | -21.1 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.5 | 10.6 | 11.9 | 13.4 | 14.6 | 15.2 | 14.9 | 13.8 | 12.5 | 11.1 | 9.8 | 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) | 4.7 | 6.9 | 7.9 | 10.2 | 12.1 | 12.6 | 13.5 | 11.8 | 10.9 | 8.8 | 7.2 | 5.7 |
| Precipitation (mm) | 75 | 42 | 61 | 53 | 31 | 33 | 2 | 46 | 16 | 33 | 19 | 36 |
| Sunny days | 10 | 13 | 9 | 15 | 14 | 15 | 23 | 21 | 20 | 22 | 22 | 20 |
| Rainy days | 1 | 2 | 4 | 6 | 17 | 15 | 8 | 10 | 10 | 9 | 8 | 4 |
| Snow days | 20 | 13 | 18 | 9 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7 |
The best time to visit Saint Charles during the most sunny months:
The largest precipitation sum in Saint Charles is at