Average annual temperature is 8.9 °C
Absolute maximum temperature: 36.4 °C
Absolute minimum temperature: -27.0 °C
Number of sunny days: 192 days
Number of rainy days: 144 days
Number of snow days: 29 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) | 3.3 | 4.8 | 5.9 | 26.9 | 31.4 | 32.2 | 33.1 | 36.4 | 35.7 | 29.1 | 17.6 | 11.2 |
| Average daytime temperature (°C) | -3.1 | -0.9 | 2.4 | 11.5 | 22.9 | 28.2 | 27.6 | 27.9 | 24.8 | 14.5 | 6.9 | 4.0 |
| Average temperature (°C) | -6.7 | -6.4 | -2.6 | 5.7 | 16.4 | 22.2 | 22.0 | 22.1 | 19.4 | 10.3 | 2.4 | 0.3 |
| Average night temperature (°C) | -9.7 | -11.0 | -6.9 | 1.5 | 10.9 | 17.0 | 17.3 | 17.8 | 15.4 | 7.0 | -0.8 | -2.3 |
| Absolute minimum temperature (°C) | -23.8 | -27.0 | -15.0 | -10.1 | 1.4 | 10.5 | 13.9 | 12.9 | 7.5 | -5.0 | -13.5 | -10.4 |
| 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 | 14.9 | 15.6 | 15.2 | 14.0 | 12.5 | 11.0 | 9.6 | 8.8 |
| 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) | 3.8 | 7.1 | 6.9 | 7.8 | 11.3 | 12.7 | 12.4 | 11.5 | 9.1 | 7.1 | 6.1 | 4.6 |
| Precipitation (mm) | 58 | 64 | 62 | 154 | 103 | 101 | 136 | 69 | 160 | 134 | 14 | 65 |
| Sunny days | 21 | 17 | 15 | 11 | 16 | 17 | 13 | 19 | 11 | 13 | 21 | 18 |
| Rainy days | 5 | 7 | 8 | 16 | 15 | 13 | 18 | 12 | 19 | 16 | 6 | 9 |
| Snow days | 5 | 4 | 8 | 3 | 0 | 0 | 0 | 0 | 0 | 2 | 3 | 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