Average annual temperature is 13.0 °C
Absolute maximum temperature: 36.3 °C
Absolute minimum temperature: -10.1 °C
Number of sunny days: 192 days
Number of rainy days: 167 days
Number of snow days: 6 days
Look at detailed online map of Potomac
* Weather data for Potomac 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) | 16.5 | 22.3 | 23.0 | 29.9 | 29.3 | 35.0 | 36.3 | 34.6 | 36.1 | 27.7 | 21.9 | 16.5 |
| Average daytime temperature (°C) | 8.4 | 11.5 | 12.4 | 21.3 | 23.2 | 27.2 | 32.0 | 30.7 | 26.2 | 20.1 | 12.7 | 9.3 |
| Average temperature (°C) | 3.9 | 4.9 | 5.7 | 13.4 | 16.1 | 20.2 | 24.9 | 23.5 | 19.5 | 13.8 | 5.9 | 4.2 |
| Average night temperature (°C) | 0.5 | -0.4 | 0.6 | 6.3 | 9.2 | 13.5 | 18.1 | 17.5 | 13.6 | 8.6 | 0.7 | 0.6 |
| Absolute minimum temperature (°C) | -6.2 | -10.1 | -6.7 | -2.4 | 1.7 | 8.1 | 14.1 | 10.6 | 7.7 | 1.1 | -5.7 | -5.6 |
| 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 | 14.6 | 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) | 5.0 | 7.3 | 7.8 | 9.3 | 10.8 | 11.0 | 12.2 | 10.9 | 9.1 | 8.1 | 7.6 | 5.1 |
| Precipitation (mm) | 63 | 55 | 88 | 63 | 47 | 82 | 59 | 60 | 90 | 30 | 53 | 80 |
| Sunny days | 12 | 18 | 15 | 20 | 17 | 13 | 11 | 11 | 18 | 18 | 23 | 16 |
| Rainy days | 17 | 8 | 15 | 10 | 14 | 17 | 20 | 20 | 12 | 13 | 7 | 14 |
| Snow days | 2 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
The best time to visit Potomac during the most sunny months:
The largest precipitation sum in Potomac is at