Average annual temperature is 11.5 °C
Absolute maximum temperature: 34.5 °C
Absolute minimum temperature: -22.2 °C
Number of sunny days: 161 days
Number of rainy days: 191 days
Number of snow days: 13 days
Look at detailed online map of Watertown
* Weather data for Watertown 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) | 18.2 | 17.5 | 15.0 | 32.5 | 28.8 | 34.5 | 32.1 | 29.2 | 33.9 | 27.8 | 18.5 | 15.1 |
| Average daytime temperature (°C) | 6.9 | 6.4 | 8.6 | 17.3 | 20.8 | 24.8 | 28.5 | 25.7 | 22.8 | 18.3 | 9.6 | 8.0 |
| Average temperature (°C) | 3.0 | 1.5 | 3.5 | 11.0 | 14.5 | 18.8 | 23.4 | 21.0 | 18.3 | 13.5 | 4.6 | 3.8 |
| Average night temperature (°C) | -0.4 | -2.8 | -0.9 | 6.1 | 8.7 | 13.8 | 19.3 | 17.0 | 14.7 | 9.8 | 0.8 | 0.8 |
| Absolute minimum temperature (°C) | -5.1 | -22.2 | -6.3 | -2.0 | 2.2 | 7.4 | 14.8 | 13.1 | 8.2 | 2.7 | -4.9 | -6.4 |
| 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 | 10.6 | 11.9 | 13.3 | 14.5 | 15.1 | 14.8 | 13.8 | 12.5 | 11.1 | 9.9 | 9.2 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 14.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 4.5 | 6.5 | 7.5 | 8.7 | 11.9 | 10.5 | 11.2 | 9.5 | 7.6 | 7.6 | 7.0 | 5.1 |
| Precipitation (mm) | 144 | 49 | 133 | 126 | 74 | 89 | 195 | 111 | 269 | 104 | 54 | 206 |
| Sunny days | 9 | 17 | 13 | 14 | 20 | 5 | 6 | 10 | 14 | 18 | 18 | 17 |
| Rainy days | 17 | 7 | 15 | 16 | 11 | 25 | 25 | 21 | 16 | 13 | 12 | 13 |
| Snow days | 5 | 4 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
The best time to visit Watertown during the most sunny months:
The largest precipitation sum in Watertown is at