Average temperature in December is -3.5 °C
Average daytime temperature is -1.8 °C
Average night temperature is -5.4 °C
Absolute maximum temperature: 5.6 °C
Absolute minimum temperature: -13.9 °C
Number of sunny days: 5
Number of rainy days: 10
Number of snow days: 16
Precipitation sum: 54 mm
* Weather data for Harku Estonia 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 | -1.9 | -3.3 | -4.5 | -6.1 | -6.5 | -6.4 | -6.6 | -8 | -8.8 | -6.9 | -5.4 | -2.9 | -1.6 | -3.3 | -1.4 | 4.4 | 5 | 3.1 | 5.6 | 1 | 0.3 | 1.4 | 0.1 | 0.4 | -1 | -1.1 | -0.1 | -0.3 | 2 | 1.9 | -4.7 |
| Apparent max temperature | -6.3 | -6.9 | -7.9 | -9.8 | -10.1 | -11 | -11.4 | -13.2 | -13.9 | -11.7 | -10.3 | -6.5 | -5.5 | -7 | -5 | -0.9 | -0.6 | -0.6 | -0.2 | -3.2 | -3.2 | -2.7 | -3.6 | -3.8 | -5.1 | -4.4 | -4.5 | -4.4 | -1.4 | -0.9 | -10.2 |
| Mean temperature | -3.2 | -4.7 | -5.8 | -7.3 | -8.7 | -9.6 | -8.3 | -10.2 | -10.4 | -8 | -6.6 | -3.6 | -3.5 | -3.9 | -2.7 | 0.9 | 2.2 | 2.1 | 3 | 0 | -0.4 | 0.5 | -0.6 | -1.3 | -2.5 | -2.8 | -1.4 | -2 | 1.1 | 0.1 | -6.5 |
| Apparent mean temperature | -8.6 | -10.4 | -12.2 | -13.8 | -15.6 | -19 | -16.5 | -18.8 | -17.5 | -14.2 | -12.9 | -9.8 | -8.2 | -8.2 | -9.6 | -7.3 | -3.3 | -2.9 | -4.5 | -5.6 | -6.5 | -6.5 | -5.8 | -8.6 | -7.9 | -11.5 | -7.2 | -8.8 | -3.8 | -10 | -12.5 |
| Minimum temperature | -4.9 | -6.7 | -8 | -10 | -10.8 | -13.4 | -11.1 | -13.9 | -12.5 | -9.1 | -7.8 | -5 | -4.7 | -4.4 | -5.5 | -3.1 | 0.7 | 1 | 0.9 | -1.3 | -1.5 | -0.5 | -1.5 | -4.8 | -3.5 | -6.7 | -2.4 | -4.5 | -0.7 | -4.1 | -7.2 |
| Apparent min temperature | -7.3 | -8.3 | -9.5 | -11.2 | -13.1 | -14.7 | -13.8 | -15.4 | -15.5 | -12.9 | -11.7 | -7.9 | -7.1 | -7.8 | -6.6 | -3.6 | -2.3 | -1.5 | -2.4 | -4.5 | -4.6 | -4.3 | -4.3 | -5.5 | -6.6 | -6.5 | -5.9 | -6.4 | -2.5 | -3.9 | -11.3 |
| 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 | 6.5 | 6.4 | 6.4 | 6.3 | 6.3 | 6.3 | 6.2 | 6.2 | 6.2 | 6.2 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.2 | 6.2 |
| Sunshine duration (h) | 0 | 0 | 2 | 0 | 0 | 2.9 | 0 | 1 | 0 | 2.5 | 0 | 0 | 0 | 0 | 0 | 0 | 0.8 | 0 | 3.2 | 3.5 | 0 | 0 | 0 | 0 | 0 | 0 | 2.4 | 0.5 | 0 | 0 | 0 |
| Precipitation (mm) | 2.5 | 0.6 | 1.5 | 0.3 | 0 | 0 | 0 | 0.2 | 0 | 1 | 1.2 | 4.7 | 2.7 | 0.5 | 1.9 | 0.7 | 0.1 | 0 | 6.5 | 2.9 | 1.7 | 5.2 | 0.4 | 1.6 | 1.6 | 1.2 | 3.1 | 3 | 4 | 4.8 | 0.2 |
| Precipitation hours | 16 | 6 | 9 | 3 | 0 | 0 | 0 | 2 | 0 | 6 | 8 | 23 | 24 | 5 | 12 | 4 | 1 | 0 | 8 | 7 | 6 | 13 | 3 | 11 | 14 | 1 | 8 | 9 | 11 | 20 | 2 |
| Wind speed (m/s) | 14.8 | 10.4 | 8.9 | 8.2 | 12.2 | 14 | 19.2 | 17.6 | 13.5 | 13.4 | 14.9 | 12.8 | 9.9 | 9.4 | 10.6 | 26 | 27.5 | 17.7 | 31.4 | 24.7 | 23.2 | 25.2 | 14.3 | 13.7 | 12.7 | 13.4 | 18.1 | 18.1 | 14 | 21.2 | 19.2 |
In December 2023, the highest daytime temperature in Harku was 5.6°C.
While the minimum temperature at night dropped to -13.9°C.
The average nighttime and daytime temperatures during December in Harku are -5.4°C and -1.8°C respectively.
The precipitation sum in December is about 54 mm.