Average temperature in December is -4.3 °C
Average daytime temperature is -1.5 °C
Average night temperature is -7.7 °C
Absolute maximum temperature: 9.2 °C
Absolute minimum temperature: -17.1 °C
Number of sunny days: 12
Number of rainy days: 12
Number of snow days: 7
Precipitation sum: 89 mm
* Weather data for Porsgrunn Norway 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 | -3.3 | -5.8 | -5.6 | -6.2 | -5.8 | -4.4 | -3.7 | -2.2 | 0.8 | 0.9 | 0.2 | -0.5 | -4.1 | -7.3 | -1.5 | 9.2 | 5.5 | 5 | 5.1 | 0.5 | 0.8 | -0.1 | -7.7 | -2.6 | -2.2 | -1.5 | -3.1 | -2.7 | -1.1 | -1.2 | -1.5 |
| Apparent max temperature | -7.3 | -10.3 | -9.4 | -10.1 | -10.1 | -8.3 | -8.2 | -7 | -2.7 | -3 | -4.5 | -4.3 | -8.2 | -11.3 | -4.9 | 4.6 | 2.3 | 1.6 | 0.7 | -3.8 | -3.7 | -4.8 | -12.6 | -6.3 | -5.3 | -5.7 | -8.1 | -6.1 | -4.2 | -5.1 | -5.8 |
| Mean temperature | -6.4 | -8.2 | -7.6 | -7.5 | -7.1 | -5.6 | -5.3 | -3.8 | -0.1 | 0 | -0.5 | -3.6 | -8.4 | -11.6 | -6.3 | 5.5 | 2.6 | 1.5 | 0.5 | -4 | -2.2 | -3.4 | -9.5 | -6.6 | -5 | -5.9 | -7.1 | -3.8 | -2.3 | -4 | -2.4 |
| Apparent mean temperature | -14.4 | -14 | -13.5 | -13.2 | -13.2 | -10.7 | -11.4 | -10.4 | -6.9 | -6.1 | -6.5 | -13.2 | -19.7 | -22.1 | -14.8 | -4.2 | -6.1 | -4 | -7.6 | -14.1 | -12.3 | -13.3 | -19 | -17.3 | -16.8 | -17.7 | -15.7 | -10.6 | -9.7 | -11.2 | -10 |
| Minimum temperature | -10.5 | -9.7 | -8.9 | -9.1 | -8.7 | -6.1 | -6.6 | -5.3 | -2.1 | -0.9 | -1.1 | -8.8 | -15 | -17.1 | -10.5 | -0.5 | -2.1 | -0.8 | -3.7 | -10 | -8.6 | -8 | -13.9 | -13.1 | -12 | -13 | -10.7 | -5.4 | -5.4 | -7.2 | -3.5 |
| Apparent min temperature | -10.5 | -12.4 | -11.6 | -11.5 | -11.5 | -9.9 | -10.1 | -8.8 | -4 | -4.6 | -5.6 | -7.5 | -13 | -15.9 | -10.2 | 1.8 | -0.6 | -1.5 | -3.4 | -7.9 | -6.7 | -8.3 | -14.4 | -10.7 | -9 | -10.5 | -11.8 | -8.3 | -5.8 | -7.8 | -7.9 |
| 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) | 6.7 | 6.6 | 6.6 | 6.6 | 6.5 | 6.5 | 6.4 | 6.4 | 6.4 | 6.3 | 6.3 | 6.3 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.3 |
| Sunshine duration (h) | 4.6 | 4.3 | 3 | 2.1 | 1 | 0 | 2.2 | 0 | 0 | 0 | 0 | 2.3 | 1 | 1.3 | 0.9 | 1.1 | 0.3 | 3.1 | 3.1 | 2.2 | 0 | 3.3 | 3.8 | 0 | 1.4 | 3.4 | 3.6 | 0.8 | 0 | 3.4 | 0 |
| Precipitation (mm) | 0 | 0 | 0 | 0.1 | 0.4 | 2.1 | 0 | 3.3 | 18.3 | 7.3 | 3 | 0 | 0 | 0.3 | 0 | 0.9 | 0.3 | 0.6 | 0 | 0.9 | 10.9 | 0 | 0 | 4.4 | 0.6 | 0 | 0.2 | 11 | 7.5 | 0 | 16.6 |
| Precipitation hours | 0 | 0 | 0 | 1 | 4 | 20 | 0 | 6 | 24 | 24 | 18 | 0 | 0 | 3 | 0 | 6 | 3 | 5 | 0 | 3 | 13 | 0 | 0 | 10 | 2 | 0 | 2 | 9 | 11 | 0 | 16 |
| Wind speed (m/s) | 9.4 | 7.8 | 8.9 | 6.4 | 9.7 | 9.4 | 15.4 | 16.6 | 15.4 | 19.1 | 21.4 | 10.8 | 11.5 | 9.2 | 9.2 | 22.6 | 12.6 | 14.6 | 16.2 | 13.4 | 19.2 | 14.5 | 12.7 | 14.8 | 12.4 | 13.1 | 13.6 | 22.7 | 13.5 | 12.2 | 25.7 |
In December 2023, the highest daytime temperature in Porsgrunn was 9.2°C.
While the minimum temperature at night dropped to -17.1°C.
The average nighttime and daytime temperatures during December in Porsgrunn are -7.7°C and -1.5°C respectively.
The precipitation sum in December is about 89 mm.