Average annual temperature is 9.4 °C
Absolute maximum temperature: 34.9 °C
Absolute minimum temperature: -24.4 °C
Number of sunny days: 183 days
Number of rainy days: 149 days
Number of snow days: 33 days
Look at detailed online map of Washington County
* Weather data for Washington 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) | 6.5 | 10.5 | 16.9 | 25.6 | 29.3 | 30.5 | 32.1 | 34.9 | 32.9 | 27.9 | 17.7 | 12.1 |
| Average daytime temperature (°C) | 0.6 | 2.2 | 5.0 | 14.0 | 20.5 | 25.5 | 27.5 | 26.1 | 23.2 | 15.1 | 7.4 | 4.6 |
| Average temperature (°C) | -2.9 | -2.9 | 0.1 | 7.9 | 14.0 | 19.4 | 21.8 | 20.9 | 18.2 | 11.1 | 3.2 | 1.4 |
| Average night temperature (°C) | -5.4 | -7.2 | -3.8 | 3.0 | 8.8 | 14.2 | 17.1 | 16.7 | 14.9 | 7.9 | 0.1 | -1.0 |
| Absolute minimum temperature (°C) | -24.4 | -23.6 | -13.1 | -3.1 | -0.3 | 6.3 | 12.1 | 10.3 | 9.1 | -3.0 | -12.5 | -8.5 |
| 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) | 9.4 | 10.5 | 11.9 | 13.4 | 14.7 | 15.3 | 15.0 | 13.9 | 12.5 | 11.0 | 9.7 | 9.0 |
| Daylight minimum duration (h) | 9.0 | 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) | 3.6 | 6.9 | 6.5 | 8.1 | 10.5 | 12.0 | 12.6 | 11.3 | 8.6 | 6.4 | 6.5 | 4.0 |
| Precipitation (mm) | 46 | 84 | 89 | 98 | 38 | 69 | 112 | 131 | 87 | 94 | 35 | 56 |
| Sunny days | 12 | 16 | 8 | 15 | 20 | 22 | 11 | 15 | 14 | 12 | 22 | 16 |
| Rainy days | 7 | 9 | 12 | 15 | 11 | 8 | 20 | 16 | 16 | 17 | 7 | 11 |
| Snow days | 12 | 3 | 11 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 1 | 4 |
The best time to visit Washington County during the most sunny months:
Months with the longest average daylight duration in Washington County:
The largest precipitation sum in Washington County is at