Average temperature in January is -20 °C
Average daytime temperature is -16.1 °C
Average night temperature is -24.8 °C
Absolute maximum temperature: -4.3 °C
Absolute minimum temperature: -42.3 °C
Number of sunny days: 21
Number of rainy days: 2
Number of snow days: 8
Precipitation sum: 9 mm
* Weather data for Irkutsk Russia is based on climate observations for 2023 year
| January (°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 | -25.9 | -19.4 | -19.8 | -15.3 | -17.3 | -11.1 | -7.4 | -9.3 | -5.1 | -10.2 | -9.9 | -22 | -22.2 | -22.3 | -14.9 | -11.4 | -12.9 | -14.2 | -23.8 | -20 | -26.5 | -34.4 | -26.7 | -23.9 | -21 | -16.3 | -6.4 | -4.3 | -5.8 | -9.3 | -10.5 |
| Apparent max temperature | -30.9 | -24.7 | -24.9 | -21.3 | -22.7 | -16 | -11.9 | -14 | -9.3 | -13.9 | -15.3 | -26.3 | -27.4 | -26.9 | -19.5 | -16.9 | -17.1 | -19.4 | -28.9 | -24.9 | -33 | -40.2 | -33.4 | -29.7 | -25.3 | -20.9 | -11.3 | -9.2 | -10.1 | -14.2 | -15.3 |
| Mean temperature | -28.5 | -24.5 | -21.7 | -20.1 | -19.4 | -13.7 | -13 | -11.7 | -8.4 | -12.3 | -15.3 | -25.8 | -27.5 | -26.5 | -18.1 | -15.2 | -14.9 | -22.1 | -26.9 | -23.1 | -30.3 | -37.3 | -31.1 | -27.5 | -23.5 | -21.4 | -13 | -9.4 | -10.6 | -11.7 | -15.5 |
| Apparent mean temperature | -36.2 | -35.8 | -31.6 | -29 | -28.4 | -25 | -24 | -23.4 | -17.7 | -19.6 | -27.5 | -37.6 | -35.8 | -36.1 | -34 | -23.9 | -22.4 | -35.2 | -37.7 | -32 | -40.5 | -47.9 | -47.9 | -35.5 | -33.3 | -33.3 | -27.1 | -17.9 | -20.3 | -18.6 | -29.3 |
| Minimum temperature | -30 | -29.1 | -26.7 | -23.1 | -22.7 | -18.4 | -18.3 | -18 | -11.8 | -14.4 | -21.5 | -31.6 | -29.9 | -30.2 | -27.5 | -18.6 | -16.9 | -29.9 | -32.6 | -26.8 | -34 | -42.1 | -42.3 | -29.9 | -28.1 | -28.2 | -21.4 | -12.8 | -15.3 | -14 | -23.6 |
| Apparent min temperature | -33.6 | -30.2 | -27.3 | -26 | -24.9 | -19.7 | -17.9 | -17.4 | -13.8 | -16.8 | -21.6 | -31 | -33.1 | -32 | -23.4 | -20.5 | -19.9 | -29.1 | -31.9 | -28.2 | -36.5 | -42.9 | -37.6 | -33.4 | -27.9 | -26.6 | -18 | -14.1 | -15.4 | -16.6 | -20.9 |
| January | 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) | 7.8 | 7.8 | 7.8 | 7.9 | 7.9 | 7.9 | 7.9 | 8 | 8 | 8 | 8.1 | 8.1 | 8.2 | 8.2 | 8.2 | 8.3 | 8.3 | 8.4 | 8.4 | 8.4 | 8.5 | 8.5 | 8.6 | 8.6 | 8.7 | 8.8 | 8.8 | 8.9 | 8.9 | 9 | 9 |
| Sunshine duration (h) | 6.3 | 6.3 | 3.3 | 6.4 | 2.9 | 6.4 | 4.4 | 6.4 | 6.5 | 4 | 0 | 6.6 | 6.7 | 6.2 | 3.2 | 0.6 | 3.3 | 4.6 | 7 | 0.4 | 6.8 | 6.4 | 7.2 | 5.3 | 7 | 7.4 | 7.4 | 5.1 | 7.4 | 7.5 | 7.4 |
| Precipitation (mm) | 0 | 0 | 0 | 0 | 0 | 0 | 0.2 | 0 | 0 | 0.6 | 4.4 | 0 | 0 | 0 | 1.1 | 0.9 | 0.2 | 0.1 | 0 | 0.4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.1 | 0 | 0.7 | 0 |
| Precipitation hours | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 3 | 20 | 0 | 0 | 0 | 10 | 9 | 2 | 1 | 0 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 7 | 0 |
| Wind speed (m/s) | 16.9 | 18.4 | 18 | 19.5 | 18.9 | 19.5 | 14.4 | 19.6 | 20.6 | 12.1 | 26 | 13 | 14.8 | 14.4 | 16.4 | 14.8 | 11.5 | 36.4 | 13.4 | 12.6 | 16.6 | 17.7 | 21.1 | 19.7 | 7.9 | 14.4 | 17.1 | 14.8 | 14 | 20.6 | 19 |
In January 2023, the highest daytime temperature in Irkutsk was -4.3°C.
While the minimum temperature at night dropped to -42.3°C.
The average nighttime and daytime temperatures during January in Irkutsk are -24.8°C and -16.1°C respectively.
The precipitation sum in January is about 9 mm.