Average temperature in December is -16.4 °C
Average daytime temperature is -10 °C
Average night temperature is -22.2 °C
Absolute maximum temperature: 2.4 °C
Absolute minimum temperature: -31.3 °C
Number of sunny days: 24
Number of rainy days: 2
Number of snow days: 5
Precipitation sum: 6 mm
* Weather data for Bayan-Ulaan Mongolia 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 | -3.4 | -0.2 | -1.3 | -0.1 | -9.6 | -0.5 | 2.4 | -12.1 | -12.8 | -15.4 | -12.5 | -14.9 | -19.9 | -24.5 | -22.8 | -17.3 | -14.3 | -24 | -20.5 | -18.8 | -14.5 | -13.4 | -5.9 | -3.6 | -5 | -6.5 | -0.5 | -2.4 | -6.7 | -6.3 | -3.1 |
| Apparent max temperature | -7.9 | -4.7 | -5.5 | -4.8 | -15.8 | -5.1 | -4.5 | -17.1 | -17.6 | -20.6 | -17.3 | -20.5 | -25.5 | -31.1 | -29 | -21.7 | -19.1 | -30.1 | -25.5 | -23.4 | -20.1 | -19.8 | -10.6 | -7.6 | -11 | -10.8 | -4.2 | -6.1 | -12.7 | -10.6 | -8 |
| Mean temperature | -12.3 | -11.4 | -11.6 | -7.1 | -13.8 | -7.5 | -6.4 | -17 | -17.2 | -18.6 | -18 | -18.6 | -23 | -27.1 | -27.3 | -22.8 | -20.3 | -26 | -26.6 | -24.9 | -21.7 | -16.6 | -14.8 | -12.1 | -13.3 | -13.7 | -11.6 | -10.5 | -10.5 | -12.2 | -13.9 |
| Apparent mean temperature | -23 | -22.7 | -23.6 | -19.3 | -22.4 | -21.7 | -23.2 | -27.1 | -27 | -28.2 | -25.7 | -26.4 | -32.5 | -36 | -37.3 | -31.3 | -32.1 | -34.8 | -37 | -34.5 | -34.1 | -27.2 | -26.6 | -24.2 | -25 | -24.8 | -25.2 | -21.9 | -25.8 | -26.5 | -26.3 |
| Minimum temperature | -17.9 | -17.2 | -18.4 | -14.4 | -16.6 | -16.6 | -17.7 | -21.5 | -21.8 | -22.7 | -21.6 | -21.1 | -26.3 | -30.3 | -31.3 | -26.1 | -26.5 | -28.8 | -31 | -29.1 | -28.7 | -21.7 | -20.9 | -19.1 | -19.9 | -20.2 | -20.6 | -17.3 | -20.1 | -20.9 | -21.3 |
| Apparent min temperature | -17.5 | -16.6 | -16.4 | -12.7 | -19.1 | -12.3 | -12.3 | -22 | -22 | -23.6 | -22.4 | -23.6 | -29.4 | -32.9 | -33.2 | -27.8 | -25.5 | -32.1 | -32 | -30.3 | -27.1 | -22.7 | -20.2 | -17 | -18.4 | -18.7 | -16 | -15.1 | -17.4 | -17 | -19 |
| 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) | 8.9 | 8.8 | 8.8 | 8.8 | 8.8 | 8.7 | 8.7 | 8.7 | 8.7 | 8.7 | 8.7 | 8.6 | 8.6 | 8.6 | 8.6 | 8.6 | 8.6 | 8.6 | 8.6 | 8.6 | 8.6 | 8.6 | 8.6 | 8.6 | 8.6 | 8.6 | 8.6 | 8.6 | 8.6 | 8.6 | 8.6 |
| Sunshine duration (h) | 7.7 | 7.7 | 7.1 | 7.6 | 7.6 | 7.6 | 7.5 | 6.7 | 7.5 | 5.1 | 7.5 | 7.1 | 0.7 | 3.3 | 7.4 | 7.4 | 6.3 | 5.8 | 7.4 | 7.4 | 7.4 | 7 | 7.4 | 7.4 | 7.1 | 7.4 | 7.4 | 7.4 | 0 | 7.4 | 7.4 |
| Precipitation (mm) | 0 | 0 | 0 | 0 | 0 | 0 | 0.3 | 0.3 | 0 | 0.1 | 0 | 0.4 | 2.2 | 0 | 0 | 0 | 0.9 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1.8 | 0 | 0 |
| Precipitation hours | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 3 | 0 | 1 | 0 | 4 | 14 | 0 | 0 | 0 | 9 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 10 | 0 | 0 |
| Wind speed (m/s) | 13.6 | 14.6 | 11.4 | 24.9 | 19.9 | 16.5 | 26.8 | 11 | 11.4 | 10.8 | 10 | 14.2 | 20.2 | 17.7 | 19.2 | 9.2 | 21.8 | 25.8 | 13.1 | 14.7 | 18.2 | 19.7 | 14 | 14.5 | 16.3 | 12.9 | 13.2 | 9.7 | 36.5 | 12 | 13.2 |
In December 2023, the highest daytime temperature in Bayan-Ulaan was 2.4°C.
While the minimum temperature at night dropped to -31.3°C.
The average nighttime and daytime temperatures during December in Bayan-Ulaan are -22.2°C and -10°C respectively.
The precipitation sum in December is about 6 mm.