Average temperature in January is -9 °C
Average daytime temperature is -5.9 °C
Average night temperature is -12.1 °C
Absolute maximum temperature: 1 °C
Absolute minimum temperature: -26.6 °C
Number of sunny days: 21
Number of rainy days: 1
Number of snow days: 9
Precipitation sum: 15 mm
* Weather data for Watertown United States is based on climate observations for 2023 year
| January (°C) | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Maximum temperature | -4.8 | -5.8 | -6.1 | -5.2 | -6.7 | -8 | -9.6 | -6.6 | -7.2 | -3.4 | -2.6 | -6.1 | -8 | 0.7 | -0.2 | -0.7 | -2.7 | -5.9 | -4.7 | -4.5 | -5.1 | -8 | -1.1 | -2.7 | -2.9 | -6.4 | 1 | -10.4 | -18.3 | -19.2 | -12.7 |
| Apparent max temperature | -9.4 | -9.6 | -10.8 | -12.5 | -13.1 | -11.9 | -15.5 | -10.7 | -11.7 | -8.4 | -7.7 | -13.4 | -15 | -7.6 | -4.8 | -5.6 | -9 | -11.6 | -11.8 | -9.8 | -10.2 | -12.4 | -8.3 | -7.9 | -8.2 | -13.6 | -6.5 | -15.1 | -25.8 | -25.6 | -19 |
| Mean temperature | -6.7 | -9.8 | -8.3 | -6.5 | -8.1 | -9.8 | -11.7 | -9.9 | -8.2 | -7.3 | -5.4 | -8.1 | -10.9 | -5 | -1.1 | -1.5 | -5.3 | -8.5 | -5.7 | -7.9 | -6.5 | -11.2 | -5.9 | -6.6 | -8.5 | -12.5 | -5 | -16.3 | -20.3 | -22 | -19.3 |
| Apparent mean temperature | -14.9 | -18.6 | -17.4 | -15.2 | -16.7 | -16.8 | -18 | -18.7 | -15.2 | -15.1 | -14.2 | -17.7 | -17.9 | -16.6 | -8.7 | -8.7 | -13.6 | -17 | -13.5 | -17.4 | -14.8 | -21 | -15.9 | -17 | -21.6 | -23.4 | -20.8 | -28.7 | -29 | -33 | -30 |
| Minimum temperature | -9.9 | -13.7 | -9.8 | -7.2 | -9.9 | -12.4 | -13.5 | -12.8 | -10 | -10.5 | -8.9 | -9.8 | -13.3 | -8.9 | -2.6 | -2.6 | -7.5 | -12.1 | -7.3 | -12.3 | -9.5 | -15.9 | -10 | -11.8 | -13.3 | -16.7 | -9.8 | -21.1 | -22.9 | -26.6 | -22.5 |
| Apparent min temperature | -11.5 | -14.1 | -14.9 | -14.1 | -14.8 | -14.3 | -16.6 | -15.7 | -14 | -12.2 | -11.1 | -15.8 | -16.5 | -12.7 | -7 | -7.3 | -12 | -14 | -12.4 | -13.2 | -11.6 | -16 | -12.5 | -12.2 | -16.3 | -19.3 | -14.2 | -23.1 | -27.2 | -28.8 | -26.5 |
| January | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight duration (h) | 8.9 | 8.9 | 8.9 | 8.9 | 8.9 | 8.9 | 9 | 9 | 9 | 9 | 9.1 | 9.1 | 9.1 | 9.1 | 9.2 | 9.2 | 9.2 | 9.3 | 9.3 | 9.3 | 9.4 | 9.4 | 9.4 | 9.5 | 9.5 | 9.5 | 9.6 | 9.6 | 9.7 | 9.7 | 9.8 |
| Sunshine duration (h) | 7.2 | 0 | 0 | 0 | 0.9 | 1.9 | 0.2 | 4.6 | 5.4 | 0.4 | 0.1 | 2.5 | 0.2 | 6.1 | 5.4 | 0 | 1.9 | 2 | 0.5 | 0.2 | 3.2 | 1.1 | 2.5 | 7.1 | 6.7 | 4.3 | 4.8 | 5.5 | 7.6 | 8.6 | 8.7 |
| Precipitation (mm) | 0 | 0.7 | 5.3 | 2.4 | 0.1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2.6 | 1.3 | 0 | 0.7 | 0 | 0 | 0 | 0 | 0 | 0.6 | 0 | 1.5 | 0 | 0.1 | 0 | 0 |
| Precipitation hours | 0 | 5 | 11 | 11 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 12 | 10 | 0 | 7 | 0 | 0 | 0 | 0 | 0 | 5 | 0 | 6 | 0 | 1 | 0 | 0 |
| Wind speed (m/s) | 15.6 | 11.5 | 36.6 | 36.9 | 28.8 | 15.7 | 20.2 | 24.1 | 24.6 | 18.6 | 35 | 33.3 | 28.1 | 42.2 | 36.7 | 33.7 | 28.7 | 23.9 | 34.1 | 21.9 | 17.3 | 12.1 | 38 | 25.4 | 38.7 | 36.2 | 60.6 | 28.8 | 25.5 | 26.1 | 27.6 |
In January 2023, the highest daytime temperature in Watertown was 1°C.
While the minimum temperature at night dropped to -26.6°C.
The average nighttime and daytime temperatures during January in Watertown are -12.1°C and -5.9°C respectively.
The precipitation sum in January is about 15 mm.