Average temperature in December is -18.8 °C
Average daytime temperature is -15.4 °C
Average night temperature is -23.2 °C
Absolute maximum temperature: 0.5 °C
Absolute minimum temperature: -37.8 °C
Number of sunny days: 19
Number of rainy days:
Number of snow days: 12
Precipitation sum: 11 mm
* Weather data for Irkutsk Russia 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 | -10.2 | -2.8 | -4.8 | 0.5 | -10.2 | -10.3 | -13.3 | -25.9 | -28.6 | -29 | -29.9 | -31.2 | -31.4 | -29.4 | -28.3 | -22.1 | -21.2 | -22.9 | -27 | -18.9 | -17.1 | -16.9 | -6.1 | -2.5 | -3.9 | -6.8 | -5.9 | -2.8 | -4.3 | -4.8 | -8 |
| Apparent max temperature | -14.1 | -5.9 | -9.3 | -3.3 | -16.1 | -14.2 | -18.4 | -31.2 | -33.4 | -34 | -34.8 | -35.9 | -36.3 | -33.9 | -32.8 | -26.2 | -25.8 | -29.2 | -31.4 | -24.6 | -23 | -20.9 | -10.3 | -6.1 | -8.1 | -11.9 | -9.5 | -5.8 | -7.8 | -9.3 | -11.5 |
| Mean temperature | -12.4 | -6.8 | -8.1 | -4.1 | -15.9 | -14 | -18.3 | -29.4 | -31.2 | -32.5 | -33.9 | -34.8 | -33.1 | -32 | -30.8 | -24.9 | -22.7 | -25.7 | -30.5 | -25 | -21.9 | -20.4 | -9.8 | -6.9 | -7.9 | -9.2 | -7.3 | -7.6 | -7 | -8.9 | -11.3 |
| Apparent mean temperature | -20.9 | -15.3 | -17.6 | -15.8 | -27 | -23.1 | -33.1 | -38 | -40.3 | -40.7 | -42.3 | -42.4 | -43.3 | -38.8 | -39.2 | -34.8 | -32.6 | -34.6 | -38.6 | -39 | -30.9 | -28.6 | -26.1 | -16.6 | -19.6 | -17.7 | -15.9 | -14.6 | -14.4 | -15.4 | -19.1 |
| Minimum temperature | -15.8 | -11.1 | -12.6 | -9.5 | -21.4 | -18.4 | -27.8 | -32.7 | -35.2 | -35.1 | -36.9 | -37.3 | -37.8 | -34.4 | -34.6 | -30 | -27.6 | -29.2 | -33.7 | -33.9 | -25.2 | -24 | -20.3 | -11.7 | -14.5 | -13.3 | -11.2 | -10 | -9.8 | -10.7 | -14.6 |
| Apparent min temperature | -16.6 | -11 | -13.3 | -9.2 | -21.2 | -18.4 | -24.9 | -34.6 | -36.1 | -37.8 | -39.2 | -40.1 | -38 | -36.5 | -35.2 | -29.4 | -28.2 | -31.4 | -35.2 | -30.6 | -27.4 | -25.2 | -14.1 | -11.5 | -12.2 | -14.5 | -11.1 | -11.5 | -11.1 | -13.4 | -15.9 |
| 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) | 8.1 | 8 | 8 | 8 | 7.9 | 7.9 | 7.9 | 7.9 | 7.8 | 7.8 | 7.8 | 7.8 | 7.8 | 7.8 | 7.7 | 7.7 | 7.7 | 7.7 | 7.7 | 7.7 | 7.7 | 7.7 | 7.7 | 7.7 | 7.7 | 7.7 | 7.7 | 7.7 | 7.7 | 7.8 | 7.8 |
| Sunshine duration (h) | 5.7 | 3.6 | 3.4 | 3.9 | 6.5 | 0.3 | 0 | 6.3 | 6.3 | 6.3 | 6.1 | 6.2 | 6 | 6.1 | 6.1 | 3.8 | 4 | 2.4 | 4.5 | 6.1 | 6.1 | 5.1 | 0 | 6 | 1.1 | 3.7 | 0.5 | 5.3 | 0 | 6.1 | 4.5 |
| Precipitation (mm) | 0 | 2 | 0.7 | 2.7 | 0 | 0.4 | 0.8 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.1 | 0 | 0 | 0 | 0 | 0 | 1.7 | 0 | 0.1 | 0 | 0.5 | 0 | 0.8 | 1.4 | 0.2 |
| Precipitation hours | 0 | 4 | 3 | 13 | 0 | 2 | 7 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 12 | 0 | 1 | 0 | 5 | 0 | 8 | 6 | 2 |
| Wind speed (m/s) | 9.5 | 14.8 | 18.6 | 23.2 | 16 | 9.5 | 27.5 | 12 | 7.3 | 12.2 | 10 | 10.1 | 9 | 4 | 3.7 | 5.4 | 17.4 | 17.7 | 7.7 | 15.9 | 17.1 | 15.8 | 13.3 | 14.6 | 12.7 | 18.1 | 12 | 10.7 | 12.1 | 11.8 | 11.3 |
In December 2023, the highest daytime temperature in Irkutsk was 0.5°C.
While the minimum temperature at night dropped to -37.8°C.
The average nighttime and daytime temperatures during December in Irkutsk are -23.2°C and -15.4°C respectively.
The precipitation sum in December is about 11 mm.