Average annual temperature is 15.3 °C
Absolute maximum temperature: 37.5 °C
Absolute minimum temperature: -8.0 °C
Number of sunny days: 186 days
Number of rainy days: 178 days
Number of snow days: 1 day
Look at detailed online map of Charles County
* Weather data for Charles County 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) | 19.1 | 25.0 | 25.0 | 32.5 | 29.2 | 32.4 | 37.5 | 34.9 | 36.4 | 28.6 | 27.1 | 17.6 |
| Average daytime temperature (°C) | 11.1 | 13.1 | 14.4 | 23.1 | 23.0 | 27.7 | 31.6 | 30.3 | 27.1 | 21.9 | 14.3 | 11.7 |
| Average temperature (°C) | 6.7 | 7.8 | 8.7 | 16.3 | 17.3 | 22.0 | 26.1 | 24.9 | 21.8 | 16.3 | 8.8 | 6.8 |
| Average night temperature (°C) | 3.5 | 3.6 | 3.9 | 11.1 | 12.5 | 17.1 | 21.8 | 20.7 | 17.5 | 11.8 | 4.7 | 3.3 |
| Absolute minimum temperature (°C) | -1.8 | -8.0 | -3.0 | 4.0 | 7.7 | 12.9 | 19.0 | 16.6 | 11.4 | 6.5 | -4.2 | -2.8 |
| 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 | 10.8 | 12.0 | 13.2 | 14.3 | 14.8 | 14.5 | 13.6 | 12.4 | 11.2 | 10.1 | 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) | 5.5 | 6.8 | 7.8 | 9.4 | 10.8 | 11.0 | 11.9 | 10.9 | 8.7 | 8.7 | 7.8 | 5.7 |
| Precipitation (mm) | 92 | 74 | 49 | 123 | 50 | 93 | 134 | 66 | 99 | 37 | 55 | 168 |
| Sunny days | 16 | 16 | 16 | 17 | 15 | 9 | 11 | 11 | 16 | 19 | 22 | 18 |
| Rainy days | 15 | 12 | 15 | 13 | 16 | 21 | 20 | 20 | 14 | 12 | 7 | 13 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 |
The best time to visit Charles County during the most sunny months:
The largest precipitation sum in Charles County is at