Average temperature in December is 1 °C
Average daytime temperature is 6.6 °C
Average night temperature is -3.1 °C
Absolute maximum temperature: 17.4 °C
Absolute minimum temperature: -7 °C
Number of sunny days: 25
Number of rainy days: 3
Number of snow days: 3
Precipitation sum: 23 mm
* Weather data for Rapid City United States 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 | 2.3 | 5.2 | 4.5 | 8.1 | 8.6 | 17.4 | 14.8 | 7.3 | 3.5 | 4.8 | 9.3 | 3.1 | 6.8 | 7.1 | 5 | 7.4 | 9.9 | 6.6 | 10.5 | 8.3 | 13 | 10.8 | 9.8 | 4.1 | -1.2 | -1.2 | 1.2 | 4.1 | 9.1 | 4.5 | 0.1 |
| Apparent max temperature | -1.8 | 0.4 | -2.8 | -0.1 | 4.1 | 15.8 | 9.5 | 3.7 | -3.7 | 0.5 | 4 | -3.4 | 1.7 | 2.1 | -1.8 | 2.6 | 4.2 | 2 | 7.5 | 5.1 | 8.4 | 7.8 | 6.9 | -3.2 | -9.7 | -9.2 | -4.2 | -0.1 | 5.9 | -1 | -5.9 |
| Mean temperature | -2.1 | -1.8 | 1 | 1.9 | 1.9 | 9.4 | 7.2 | 3.7 | 0.2 | -1.1 | 1.4 | -1.4 | -1.2 | 2.7 | 1.4 | -1.8 | 3.7 | -0.3 | 3.4 | 1.9 | 4 | 4 | 2.9 | -0.7 | -3.2 | -2.8 | 0.2 | -2.5 | 0.5 | 0 | -4 |
| Apparent mean temperature | -10.8 | -9.6 | -7.5 | -7.9 | -8.3 | -2.6 | -4.2 | -6.3 | -9.8 | -8.7 | -6.8 | -9 | -9.2 | -5.3 | -6.8 | -10.9 | -7 | -9.4 | -5.3 | -6 | -4.9 | -4 | -5.9 | -12.6 | -11.8 | -13.5 | -8.5 | -11.8 | -9.7 | -9 | -11.3 |
| Minimum temperature | -5.6 | -5.5 | -2.3 | -3.3 | -4.3 | 1.5 | -0.8 | -1.1 | -1.9 | -4 | -2.3 | -4.8 | -5.2 | 0.2 | -1.9 | -7 | -2.1 | -3.9 | -1 | -1.9 | -1.3 | -0.3 | -1.5 | -3.2 | -5.1 | -4 | -1.7 | -6.5 | -5.3 | -4 | -6.9 |
| Apparent min temperature | -6.9 | -6.1 | -5 | -4 | -2.9 | 5.8 | 2.4 | -2.2 | -7.6 | -5.5 | -3.6 | -6.4 | -5.4 | -2.9 | -3.8 | -6.2 | -1.6 | -5.2 | -0.7 | -1.8 | 0.3 | 0.4 | -1 | -9.4 | -10.5 | -11.9 | -6.3 | -7.3 | -3.9 | -4.6 | -8.6 |
| 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) | 9.1 | 9.1 | 9.1 | 9.1 | 9 | 9 | 9 | 9 | 9 | 9 | 8.9 | 8.9 | 8.9 | 8.9 | 8.9 | 8.9 | 8.9 | 8.9 | 8.9 | 8.9 | 8.9 | 8.9 | 8.9 | 8.9 | 8.9 | 8.9 | 8.9 | 8.9 | 8.9 | 8.9 | 8.9 |
| Sunshine duration (h) | 7.7 | 7.9 | 5.6 | 4.7 | 4 | 7.8 | 7.7 | 5 | 7.7 | 4.7 | 6.5 | 7.7 | 7.7 | 6.7 | 7.7 | 7.7 | 7.7 | 7.7 | 7.7 | 6.3 | 7.7 | 7.7 | 7.7 | 0.7 | 5.4 | 0 | 7.8 | 7.8 | 7.5 | 7.8 | 7.8 |
| Precipitation (mm) | 0 | 0 | 0.2 | 0.8 | 0 | 0 | 0.1 | 0.6 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 17.2 | 3.6 | 0 | 0 | 0 | 0 |
| Precipitation hours | 0 | 0 | 2 | 3 | 0 | 0 | 1 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 23 | 10 | 0 | 0 | 0 | 0 |
| Wind speed (m/s) | 20.2 | 13.4 | 32.4 | 36.2 | 33.6 | 19.2 | 37.5 | 36.9 | 38.4 | 11.7 | 30.4 | 28.2 | 17.9 | 31.4 | 30.6 | 18.1 | 34.4 | 25.5 | 15.3 | 11.3 | 14.9 | 14.8 | 23.6 | 43.8 | 35 | 45.8 | 35.7 | 14.6 | 15 | 20.5 | 21.3 |
In December 2023, the highest daytime temperature in Rapid City was 17.4°C.
While the minimum temperature at night dropped to -7°C.
The average nighttime and daytime temperatures during December in Rapid City are -3.1°C and 6.6°C respectively.
The precipitation sum in December is about 23 mm.