Average temperature in January is -3.3 °C
Average daytime temperature is -0.5 °C
Average night temperature is -6.6 °C
Absolute maximum temperature: 6.5 °C
Absolute minimum temperature: -19.3 °C
Number of sunny days: 13
Number of rainy days: 11
Number of snow days: 7
Precipitation sum: 96 mm
* Weather data for Sundsvall Sweden 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 | 0.8 | -6.4 | -7.2 | -3.1 | -4.1 | -3 | 0.9 | 2.1 | 1.3 | 1.2 | 3.9 | 3.8 | -0.8 | -0.7 | 2.2 | 1.4 | 0.6 | 1.8 | -0.3 | -7.1 | -7 | -10.8 | -4.5 | 1.4 | 6.5 | 3.3 | -2.8 | 2.8 | 3.4 | 3.3 | 1.9 |
| Apparent max temperature | -3.8 | -11 | -12.4 | -8.4 | -8.7 | -8.2 | -2.9 | -1.2 | -1.5 | -2.4 | 0 | -0.1 | -4.4 | -4.5 | -1.6 | -2 | -3.3 | -1.6 | -3 | -11.4 | -11.8 | -15.9 | -9.3 | -2.6 | 2.8 | -0.8 | -6.7 | -2.2 | -0.7 | -0.9 | -2.6 |
| Mean temperature | -4.8 | -10.6 | -9.3 | -7.1 | -5.3 | -4.5 | -1.3 | 1.3 | 1 | 0 | 1.7 | 2.3 | -3.2 | -3.2 | 0.1 | -4.1 | -4.2 | 0.4 | -3.3 | -8.6 | -10.1 | -15.1 | -12.1 | -1 | 4.1 | 0.2 | -5.2 | -0.8 | 1.5 | 2.1 | -1.1 |
| Apparent mean temperature | -14.4 | -19.3 | -16.8 | -17 | -10.5 | -9.8 | -8.1 | -3.5 | -3.1 | -6 | -6.4 | -5.6 | -10.7 | -9.2 | -7.5 | -16.7 | -18.6 | -5.4 | -12.9 | -14.5 | -18.4 | -21.7 | -24.7 | -8.3 | -1.6 | -7.1 | -11.4 | -8.4 | -4.6 | -5.1 | -11 |
| Minimum temperature | -9.6 | -14.8 | -11.2 | -12.4 | -6.6 | -6.3 | -2.7 | 0.8 | 0.7 | -2.4 | -2.8 | -1.9 | -6.8 | -5.5 | -3.9 | -12.3 | -14.2 | -2.1 | -8.8 | -10 | -13.6 | -16.7 | -19.3 | -3.3 | 2.5 | -2.7 | -7 | -4.3 | -0.2 | 0.4 | -7 |
| Apparent min temperature | -9.8 | -15.3 | -14.5 | -11.7 | -9.8 | -9 | -5.5 | -2.5 | -2.1 | -3.3 | -2.2 | -1.5 | -6.9 | -7 | -3.8 | -8.2 | -8.3 | -3.4 | -6.7 | -13.2 | -14.8 | -19.9 | -17 | -5.1 | 0 | -4.4 | -9.6 | -5.5 | -2.5 | -2.9 | -5.9 |
| 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) | 5.2 | 5.2 | 5.3 | 5.3 | 5.4 | 5.4 | 5.5 | 5.6 | 5.6 | 5.7 | 5.7 | 5.8 | 5.9 | 6 | 6 | 6.1 | 6.2 | 6.3 | 6.3 | 6.4 | 6.5 | 6.6 | 6.7 | 6.8 | 6.9 | 6.9 | 7 | 7.1 | 7.2 | 7.3 | 7.4 |
| Sunshine duration (h) | 2 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.1 | 0 | 0 | 2.8 | 0 | 0 | 2 | 4 | 4.1 | 4.2 | 2.9 | 2.3 | 2 | 4.7 | 2.2 | 4.6 | 0.6 | 0.3 | 5.4 |
| Precipitation (mm) | 0 | 0.6 | 0 | 2.6 | 3.3 | 4.3 | 8.2 | 13.9 | 4.3 | 7.9 | 3.5 | 0 | 4.5 | 1.5 | 18.4 | 2.9 | 6.7 | 8.1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.4 | 2.1 | 2.7 | 0 |
| Precipitation hours | 0 | 4 | 0 | 12 | 23 | 24 | 17 | 24 | 7 | 16 | 5 | 0 | 11 | 5 | 17 | 6 | 12 | 12 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 8 | 8 | 0 |
| Wind speed (m/s) | 16 | 12.7 | 15.8 | 16.9 | 16.2 | 16.2 | 18 | 16.4 | 14.2 | 12.5 | 18.4 | 15.5 | 10.1 | 10 | 21.6 | 13 | 16.6 | 14.8 | 7.9 | 12.5 | 13.2 | 10.5 | 13.4 | 15.3 | 17.4 | 16.1 | 12.3 | 16.6 | 16.9 | 21.4 | 21.1 |
In January 2023, the highest daytime temperature in Sundsvall was 6.5°C.
While the minimum temperature at night dropped to -19.3°C.
The average nighttime and daytime temperatures during January in Sundsvall are -6.6°C and -0.5°C respectively.
The precipitation sum in January is about 96 mm.