Average temperature in January is -4.7 °C
Average daytime temperature is -0.7 °C
Average night temperature is -7.7 °C
Absolute maximum temperature: 6.9 °C
Absolute minimum temperature: -28.7 °C
Number of sunny days: 18
Number of rainy days: 6
Number of snow days: 7
Precipitation sum: 58 mm
* Weather data for Sumner 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 | 3.2 | 2 | 3.1 | 2.3 | 0.4 | -3.6 | -0.9 | 0.2 | 6.5 | 2.3 | 6.9 | -0.8 | -1.9 | 2.6 | 6.4 | 6.5 | 3.6 | 2.3 | 0.6 | -1.1 | -2.2 | -2.2 | -3.5 | -0.5 | -0.8 | -3.8 | 1 | -8.9 | -10.9 | -16.7 | -13.9 |
| Apparent max temperature | -0.3 | -2.2 | -1 | -1.5 | -4.1 | -8.9 | -5.4 | -4.9 | 1.7 | -2 | 3.6 | -6.1 | -6.6 | -3.9 | -0.2 | 3.5 | 0.4 | -2.7 | -5.1 | -6.8 | -5.6 | -6.2 | -8.4 | -4.2 | -4.7 | -9.5 | -4.9 | -15.3 | -17.2 | -22.4 | -19.3 |
| Mean temperature | -1 | -1 | 0.7 | 0.2 | -0.9 | -6.4 | -8.4 | -6.1 | -2.3 | -2.2 | 0.5 | -2.2 | -5 | -4.6 | 0.8 | 3.9 | 1.3 | -1.3 | -0.9 | -3.5 | -5.8 | -3.4 | -6.3 | -4.4 | -3.4 | -7.9 | -7.3 | -11.6 | -15 | -18.6 | -22.7 |
| Apparent mean temperature | -10.4 | -9.3 | -7.5 | -5.7 | -8.7 | -14.2 | -18.1 | -15.6 | -10.8 | -10.1 | -6 | -9.7 | -13.5 | -13.4 | -8.4 | -2.6 | -5.4 | -8.7 | -7.9 | -10.6 | -13.2 | -8.5 | -13.1 | -15.2 | -11.8 | -17.9 | -20.1 | -18.7 | -24.3 | -25.6 | -34.7 |
| Minimum temperature | -5.6 | -4.2 | -0.9 | -1.4 | -3 | -8.6 | -13.2 | -10.8 | -6.3 | -5.4 | -2.5 | -3.4 | -7.9 | -7.9 | -1.9 | 2.5 | -0.2 | -4.8 | -1.7 | -5.7 | -8.8 | -4.3 | -8.2 | -10.2 | -7.2 | -12.8 | -14.6 | -13.9 | -18.2 | -20.4 | -28.7 |
| Apparent min temperature | -4.9 | -5.3 | -5 | -3.8 | -5.6 | -11.6 | -13.2 | -10.7 | -7.2 | -6.5 | -3.2 | -7.8 | -10.6 | -9.8 | -5.6 | -0.8 | -3.6 | -6 | -6.3 | -9.1 | -10 | -7 | -11.4 | -8.7 | -7.3 | -13.9 | -13.8 | -17.3 | -21.5 | -24.5 | -28.2 |
| 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) | 9.1 | 9.1 | 9.1 | 9.1 | 9.1 | 9.2 | 9.2 | 9.2 | 9.2 | 9.3 | 9.3 | 9.3 | 9.3 | 9.3 | 9.4 | 9.4 | 9.4 | 9.5 | 9.5 | 9.5 | 9.6 | 9.6 | 9.6 | 9.7 | 9.7 | 9.7 | 9.8 | 9.8 | 9.8 | 9.9 | 9.9 |
| Sunshine duration (h) | 6.8 | 0.3 | 0 | 0 | 0 | 4.9 | 8.1 | 8.1 | 6.7 | 3.1 | 7.9 | 0.1 | 8.3 | 7.9 | 7.5 | 0.1 | 0 | 4.3 | 0 | 6.4 | 0 | 2.8 | 1.1 | 8.6 | 0 | 8.1 | 3.8 | 0 | 8.8 | 8.8 | 8.8 |
| Precipitation (mm) | 0 | 0 | 13.6 | 0.6 | 1.3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.1 | 0 | 0 | 12.9 | 1.5 | 0 | 14.1 | 0 | 0 | 2 | 0 | 0 | 1 | 1.5 | 1.8 | 4.4 | 2.7 | 0 | 0 |
| Precipitation hours | 0 | 0 | 17 | 6 | 13 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 11 | 5 | 0 | 20 | 0 | 0 | 10 | 0 | 0 | 9 | 9 | 7 | 12 | 8 | 0 | 0 |
| Wind speed (m/s) | 18.2 | 16.3 | 32.1 | 15.4 | 24 | 19 | 12 | 11.6 | 21.3 | 14.1 | 13.7 | 26.1 | 22.7 | 23.9 | 27.1 | 23.7 | 24.3 | 21.7 | 27.6 | 23.9 | 10.9 | 10.9 | 22.2 | 15.9 | 17.9 | 22.8 | 35.8 | 22.1 | 22.4 | 19.7 | 18.6 |
In January 2023, the highest daytime temperature in Sumner was 6.9°C.
While the minimum temperature at night dropped to -28.7°C.
The average nighttime and daytime temperatures during January in Sumner are -7.7°C and -0.7°C respectively.
The precipitation sum in January is about 58 mm.