Average annual temperature is 6.7 °C
Absolute maximum temperature: 31.4 °C
Absolute minimum temperature: -33.6 °C
Number of sunny days: 104 days
Number of rainy days: 199 days
Number of snow days: 62 days
Look at detailed online map of Town of Charleston
* Weather data for Town of Charleston 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) | 6.4 | 7.3 | 7.6 | 24.4 | 29.3 | 31.4 | 29.5 | 24.4 | 27.9 | 26.7 | 11.3 | 12.1 |
| Average daytime temperature (°C) | -0.8 | -1.4 | 2.2 | 12.3 | 17.1 | 20.7 | 24.3 | 21.0 | 20.4 | 14.1 | 3.5 | 1.8 |
| Average temperature (°C) | -4.2 | -6.9 | -2.2 | 6.0 | 11.0 | 15.8 | 19.9 | 16.8 | 15.6 | 10.2 | -0.3 | -1.7 |
| Average night temperature (°C) | -7.5 | -12.2 | -6.2 | 1.1 | 5.4 | 11.6 | 16.4 | 13.4 | 11.8 | 7.1 | -3.1 | -4.7 |
| Absolute minimum temperature (°C) | -18.1 | -33.6 | -12.3 | -11.5 | -0.8 | 5.5 | 11.4 | 8.8 | 6.8 | -2.0 | -10.6 | -15.2 |
| 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) | 9.2 | 10.4 | 11.9 | 13.5 | 14.8 | 15.5 | 15.2 | 14.0 | 12.5 | 11.0 | 9.6 | 8.9 |
| Daylight minimum duration (h) | 8.0 | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 8.0 |
| Sunshine mean duration (h) | 2.4 | 5.4 | 5.6 | 8.1 | 10.8 | 8.3 | 10.2 | 9.6 | 8.4 | 5.1 | 4.9 | 2.9 |
| Precipitation (mm) | 104 | 63 | 105 | 77 | 61 | 150 | 254 | 139 | 61 | 110 | 76 | 134 |
| Sunny days | 3 | 5 | 7 | 9 | 17 | 6 | 4 | 7 | 15 | 9 | 9 | 13 |
| Rainy days | 13 | 8 | 7 | 20 | 14 | 24 | 27 | 24 | 15 | 21 | 14 | 12 |
| Snow days | 15 | 15 | 17 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 7 | 6 |
The best time to visit Town of Charleston during the most sunny months:
Months with the longest average daylight duration in Town of Charleston:
The largest precipitation sum in Town of Charleston is at