Average temperature in December is -9 °C
Average daytime temperature is -6.4 °C
Average night temperature is -12.4 °C
Absolute maximum temperature: 1.3 °C
Absolute minimum temperature: -25.9 °C
Number of sunny days: 10
Number of rainy days: 2
Number of snow days: 19
Precipitation sum: 44 mm
* Weather data for Longyearbyen Svalbard and Jan Mayen 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 | -14.3 | -11.8 | -7.6 | -5.7 | -4.6 | -4.5 | -2.7 | -1.5 | -2.5 | -3.4 | -2 | -9.8 | 1.3 | -0.2 | 0.4 | -2.3 | -1.9 | -1.5 | -5.9 | -12.8 | -12.9 | -14 | -16.6 | -21.4 | -17 | -10.5 | -5.9 | -3.5 | -1 | -1 | -1 |
| Apparent max temperature | -19.9 | -15.8 | -11.1 | -11.1 | -9.3 | -8.7 | -7.7 | -5.3 | -5.7 | -7.2 | -5.7 | -13.8 | -2.9 | -3.2 | -3 | -6.2 | -5.9 | -5.8 | -10.5 | -17.5 | -17.2 | -18.1 | -21 | -26.4 | -22.5 | -15.7 | -9.8 | -7.4 | -4.9 | -4.4 | -4.2 |
| Mean temperature | -18.6 | -14.9 | -11.5 | -10.5 | -6.3 | -5.7 | -5.4 | -2.8 | -4.1 | -6.8 | -5.7 | -13.1 | -3 | -3.9 | -1.9 | -3.3 | -2.5 | -4.5 | -9.8 | -13.9 | -16.4 | -16.8 | -19.8 | -23.4 | -21.5 | -12 | -10.3 | -5 | -2.1 | -1.7 | -1.7 |
| Apparent mean temperature | -26.2 | -24.7 | -22.3 | -22.9 | -12.8 | -11.5 | -11.4 | -12.1 | -12.1 | -16.4 | -13.7 | -22.8 | -17.4 | -15.5 | -10.8 | -10.4 | -7.6 | -11.9 | -19.6 | -20.7 | -24.5 | -23.9 | -28.9 | -31.2 | -29 | -22.2 | -18.7 | -10.7 | -9 | -7.2 | -7.9 |
| Minimum temperature | -20.6 | -19.5 | -17.3 | -18.1 | -8.2 | -6.7 | -6.6 | -7.3 | -7.1 | -11.8 | -8.8 | -17.4 | -12.2 | -10.3 | -6.1 | -5.2 | -3.6 | -7.7 | -14.5 | -15.7 | -19.6 | -19.1 | -23.9 | -25.9 | -23.7 | -16.6 | -13.9 | -6.6 | -4.9 | -3 | -3.2 |
| Apparent min temperature | -24.1 | -19.7 | -15.7 | -15.7 | -11.1 | -10.4 | -10.3 | -7.4 | -7.9 | -11.2 | -10 | -17.9 | -7.5 | -7.7 | -5.7 | -7.8 | -6.5 | -8.8 | -14.5 | -18.7 | -21 | -21.3 | -24.5 | -28.6 | -26.9 | -17.6 | -14.8 | -8.9 | -6 | -5.7 | -6.2 |
| 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) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Sunshine duration (h) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation (mm) | 0 | 0 | 0 | 0 | 0.3 | 0.2 | 0.4 | 2.6 | 6.5 | 7.1 | 2.7 | 0 | 10.9 | 1.2 | 0.2 | 0.1 | 1.7 | 0.2 | 0.2 | 0 | 0 | 0 | 0 | 0 | 0.2 | 3.9 | 1.4 | 1.4 | 1.2 | 0.2 | 0.9 |
| Precipitation hours | 0 | 0 | 0 | 0 | 3 | 2 | 4 | 10 | 18 | 18 | 8 | 0 | 22 | 10 | 2 | 1 | 10 | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 2 | 22 | 14 | 10 | 5 | 2 | 4 |
| Wind speed (m/s) | 13.6 | 10.7 | 9.4 | 16.8 | 15.2 | 14 | 15.4 | 18.4 | 15.9 | 10.6 | 11.7 | 11.7 | 17.3 | 13.3 | 11.3 | 16.3 | 12.9 | 12.4 | 10.2 | 9.8 | 7.3 | 7.9 | 7.4 | 8.9 | 11.6 | 15 | 11.2 | 7.9 | 11.8 | 12.7 | 15.9 |
In December 2023, the highest daytime temperature in Longyearbyen was 1.3°C.
While the minimum temperature at night dropped to -25.9°C.
The average nighttime and daytime temperatures during December in Longyearbyen are -12.4°C and -6.4°C respectively.
The precipitation sum in December is about 44 mm.