Average temperature in December is -2.8 °C
Average daytime temperature is -0.6 °C
Average night temperature is -5.7 °C
Absolute maximum temperature: 6 °C
Absolute minimum temperature: -13.5 °C
Number of sunny days: 8
Number of rainy days: 13
Number of snow days: 10
Precipitation sum: 56 mm
* Weather data for Vallentuna Sweden is based on climate observations for 2023 year
| December (°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 | -0.3 | -4.8 | -4.3 | -7.6 | -7.4 | -7.4 | 0.6 | 1.4 | 0.6 | 0.6 | 1.1 | -2.2 | -2.9 | -7.4 | -0.1 | 5.5 | 4 | 4.7 | 6 | 1 | 1.2 | 0.8 | 0.2 | -0.9 | 0.3 | -1.1 | -1.1 | 1.8 | 2.9 | 0.3 | -3 |
| Apparent max temperature | -4.8 | -9.5 | -8.8 | -12.3 | -11.4 | -11.4 | -3.4 | -2.7 | -3.8 | -3.2 | -3.1 | -6.7 | -7.2 | -12.2 | -3.7 | 0.2 | -0.1 | 1.2 | 1.5 | -2.2 | -3 | -4.3 | -5 | -5.6 | -3 | -4.8 | -6.6 | -1.4 | -0.7 | -2.7 | -7.1 |
| Mean temperature | -1.2 | -6.4 | -6.3 | -10.5 | -9.4 | -9.7 | -2.1 | 0.2 | -0.3 | -0.5 | 0.3 | -3.2 | -3.8 | -8.8 | -4.6 | 2.2 | 1.9 | 3 | 2.3 | -0.7 | -0.2 | 0.5 | -2.4 | -8.8 | -0.4 | -8.3 | -5.2 | -2 | 0.9 | -0.5 | -4.2 |
| Apparent mean temperature | -7.8 | -12.5 | -16.6 | -18.9 | -16.6 | -17.2 | -13.1 | -5.2 | -5.4 | -5 | -6.4 | -8.3 | -13.6 | -15.6 | -13.9 | -7.5 | -4.4 | -2.6 | -6.8 | -7.9 | -5.6 | -5.2 | -11.8 | -16.8 | -5.2 | -16.9 | -16.1 | -13.8 | -3.5 | -7.1 | -9.5 |
| Minimum temperature | -3.1 | -7.5 | -11.5 | -13.5 | -12.2 | -12.8 | -8.7 | -1.1 | -1.2 | -1.2 | -1.9 | -4 | -8.2 | -10.6 | -9.6 | -3 | -0.5 | 1.2 | -1.9 | -3.3 | -1.5 | -0.1 | -6.7 | -11.7 | -1.2 | -11.7 | -10.7 | -9.6 | -0.1 | -2.9 | -5.1 |
| Apparent min temperature | -5.9 | -11.3 | -11.1 | -15.4 | -13.5 | -13.8 | -6.1 | -3.9 | -4.6 | -4.2 | -4.1 | -7.6 | -8.4 | -13.7 | -8.6 | -2.4 | -1.8 | -0.7 | -2.8 | -4.2 | -4.5 | -4.7 | -7.9 | -13.6 | -3.8 | -12.9 | -10.5 | -6 | -2.2 | -4.2 | -8.5 |
| December | 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) | 6.6 | 6.6 | 6.5 | 6.5 | 6.4 | 6.4 | 6.3 | 6.3 | 6.3 | 6.2 | 6.2 | 6.2 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.2 |
| Sunshine duration (h) | 0.1 | 0 | 0 | 3.5 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3.6 | 3.6 | 0 | 0 | 0 | 0 | 3.6 | 2 | 1.9 | 3.7 | 0 | 0 | 0 | 0 |
| Precipitation (mm) | 0.4 | 0.3 | 0.3 | 0 | 0 | 0 | 2 | 0.7 | 1.5 | 0.9 | 3.3 | 0.5 | 0 | 0 | 0.1 | 0 | 2.1 | 0.3 | 2.7 | 5.2 | 5 | 13.1 | 0.6 | 2.6 | 3.9 | 0.1 | 0 | 5.2 | 4.5 | 0.6 | 0 |
| Precipitation hours | 4 | 3 | 3 | 0 | 0 | 0 | 9 | 6 | 14 | 9 | 19 | 5 | 0 | 0 | 1 | 0 | 5 | 1 | 3 | 7 | 9 | 24 | 6 | 5 | 16 | 1 | 0 | 11 | 12 | 5 | 0 |
| Wind speed (m/s) | 17.4 | 15 | 13.7 | 12.7 | 6.6 | 8.1 | 11.7 | 15.2 | 14.2 | 13.8 | 16.3 | 12.9 | 15.4 | 14.6 | 11.5 | 28.8 | 19.5 | 17.6 | 28.2 | 14.2 | 23.6 | 24.8 | 22.6 | 15.5 | 15 | 13.6 | 19 | 18.7 | 12 | 12.4 | 12.8 |
In December 2023, the highest daytime temperature in Vallentuna was 6°C.
While the minimum temperature at night dropped to -13.5°C.
The average nighttime and daytime temperatures during December in Vallentuna are -5.7°C and -0.6°C respectively.
The precipitation sum in December is about 56 mm.