Average temperature in December is -17 °C
Average daytime temperature is -13.9 °C
Average night temperature is -20.9 °C
Absolute maximum temperature: -0.7 °C
Absolute minimum temperature: -30 °C
Number of sunny days: 22
Number of rainy days: 2
Number of snow days: 7
Precipitation sum: 8 mm
* Weather data for Bayan 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 | -7.6 | -6.7 | -4.9 | -3.8 | -6 | -8.3 | -0.7 | -14.7 | -18.4 | -16.7 | -16.8 | -20.2 | -20.2 | -20.7 | -22.9 | -24.5 | -21.5 | -22 | -24.9 | -23.5 | -19.1 | -17.5 | -15.2 | -11.2 | -7.4 | -11.4 | -11.1 | -5 | -7.9 | -9.1 | -10.4 |
| Apparent max temperature | -12.9 | -12 | -10.2 | -10.2 | -11.6 | -14 | -6.7 | -20.5 | -22.9 | -21.9 | -21.7 | -25 | -25.8 | -26.9 | -28.7 | -30.8 | -26.8 | -27.9 | -30.8 | -29.3 | -24.4 | -23.2 | -20.8 | -16.7 | -13 | -16.6 | -16.1 | -10.3 | -12.2 | -13.7 | -17.5 |
| Mean temperature | -11.3 | -8.9 | -9.8 | -7.2 | -11.2 | -12.2 | -6.2 | -19 | -20.6 | -19.1 | -19.5 | -22.6 | -21.8 | -21.8 | -26.2 | -27 | -23.8 | -25 | -27.6 | -25.5 | -21.6 | -21 | -18.9 | -12.8 | -12.9 | -14.4 | -12.7 | -9.5 | -10.4 | -12.4 | -13.4 |
| Apparent mean temperature | -19.6 | -18.7 | -19.9 | -17.6 | -23.4 | -22.7 | -21.9 | -30.3 | -30.9 | -26.5 | -28.4 | -30.2 | -29.1 | -28.7 | -34.7 | -35 | -33.5 | -34.4 | -35.3 | -35.2 | -31.6 | -28.7 | -29 | -25.2 | -23 | -25.1 | -21.6 | -18.1 | -17.1 | -22.5 | -24 |
| Minimum temperature | -13.8 | -13.3 | -14.2 | -12 | -17.4 | -16.6 | -15.2 | -24.5 | -25 | -21.3 | -23.2 | -24.7 | -23.4 | -23.2 | -29.2 | -29.2 | -27.9 | -29 | -30 | -29.9 | -26.2 | -23.2 | -23.3 | -19.4 | -17.1 | -19.6 | -15.3 | -13.2 | -12.3 | -16.9 | -18.5 |
| Apparent min temperature | -16.7 | -15.1 | -15 | -14.2 | -17 | -17.9 | -12.4 | -24.7 | -26 | -24 | -24.4 | -27.6 | -27.7 | -27.7 | -31.8 | -32.8 | -29.2 | -30.7 | -33.2 | -31.2 | -27.3 | -26.6 | -24.3 | -18.9 | -18.3 | -20.4 | -18 | -15 | -15.1 | -17.7 | -19.8 |
| 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) | 8.8 | 8.8 | 8.7 | 8.7 | 8.7 | 8.7 | 8.6 | 8.6 | 8.6 | 8.6 | 8.6 | 8.6 | 8.5 | 8.5 | 8.5 | 8.5 | 8.5 | 8.5 | 8.5 | 8.5 | 8.5 | 8.5 | 8.5 | 8.5 | 8.5 | 8.5 | 8.5 | 8.5 | 8.5 | 8.5 | 8.6 |
| Sunshine duration (h) | 7.1 | 7.5 | 7.4 | 7.4 | 6.7 | 6.6 | 7.3 | 7.3 | 7.3 | 6.8 | 5.7 | 7.2 | 6.3 | 0.1 | 5.6 | 7.1 | 7.1 | 3.9 | 7.2 | 7.1 | 7.2 | 7.2 | 7.2 | 7.2 | 7.2 | 7.2 | 7.2 | 7.2 | 3.5 | 6.3 | 0.2 |
| Precipitation (mm) | 0 | 0 | 0 | 0 | 1.1 | 0 | 1 | 0 | 0 | 0.5 | 0.4 | 0 | 0.9 | 2.1 | 0 | 0 | 0 | 0.2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1.4 | 0.2 | 0 |
| Precipitation hours | 0 | 0 | 0 | 0 | 5 | 0 | 4 | 0 | 0 | 5 | 3 | 0 | 9 | 21 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 13 | 2 | 0 |
| Wind speed (m/s) | 15.9 | 25.2 | 16.3 | 32.3 | 18.6 | 18.4 | 28.9 | 18.2 | 12.8 | 9.2 | 9.8 | 9.9 | 17.6 | 19.1 | 14.8 | 16.7 | 14.5 | 15.5 | 13.7 | 13.3 | 14.3 | 17.3 | 13 | 20.2 | 18.7 | 22.5 | 18.4 | 20.2 | 15.9 | 19.5 | 31.3 |
In December 2023, the highest daytime temperature in Bayan was -0.7°C.
While the minimum temperature at night dropped to -30°C.
The average nighttime and daytime temperatures during December in Bayan are -20.9°C and -13.9°C respectively.
The precipitation sum in December is about 8 mm.