Average annual temperature is 12.4 °C
Absolute maximum temperature: 35.1 °C
Absolute minimum temperature: -15.6 °C
Number of sunny days: 175 days
Number of rainy days: 184 days
Number of snow days: 6 days
Look at detailed online map of Borough of Washington
* Weather data for Borough of Washington 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) | 17.9 | 17.9 | 15.9 | 31.8 | 29.2 | 35.1 | 32.8 | 31.0 | 34.0 | 27.7 | 19.1 | 14.9 |
| Average daytime temperature (°C) | 7.6 | 8.1 | 9.8 | 18.7 | 22.5 | 26.2 | 29.5 | 27.2 | 23.9 | 18.9 | 10.4 | 8.2 |
| Average temperature (°C) | 4.0 | 2.8 | 4.3 | 12.3 | 15.5 | 19.9 | 23.9 | 22.0 | 19.0 | 13.9 | 5.5 | 4.3 |
| Average night temperature (°C) | 0.8 | -1.4 | 0.0 | 7.2 | 9.0 | 14.6 | 19.3 | 17.7 | 15.1 | 9.8 | 1.6 | 1.3 |
| Absolute minimum temperature (°C) | -4.0 | -15.6 | -5.2 | -0.6 | 3.8 | 9.9 | 15.3 | 13.5 | 8.9 | 3.9 | -5.1 | -5.1 |
| 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 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.6 | 10.7 | 11.9 | 13.3 | 14.5 | 15.0 | 14.8 | 13.8 | 12.5 | 11.1 | 9.9 | 9.3 |
| 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) | 4.6 | 7.1 | 7.3 | 8.9 | 11.8 | 10.7 | 11.8 | 9.9 | 8.2 | 8.1 | 7.4 | 4.7 |
| Precipitation (mm) | 120 | 38 | 76 | 105 | 41 | 91 | 149 | 73 | 136 | 60 | 72 | 189 |
| Sunny days | 14 | 16 | 13 | 15 | 22 | 12 | 9 | 10 | 13 | 17 | 19 | 15 |
| Rainy days | 17 | 9 | 17 | 15 | 9 | 18 | 22 | 21 | 17 | 14 | 10 | 15 |
| Snow days | 0 | 3 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 |
The best time to visit Borough of Washington during the most sunny months:
The largest precipitation sum in Borough of Washington is at