Average temperature in December is 5.9 °C
Average daytime temperature is 10.9 °C
Average night temperature is 2.5 °C
Absolute maximum temperature: 17.2 °C
Absolute minimum temperature: -5.1 °C
Number of sunny days: 15
Number of rainy days: 16
Number of snow days:
Precipitation sum: 62 mm
* Weather data for Richland 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 | 11.8 | 11.3 | 11.9 | 9.9 | 8.2 | 10.1 | 17.2 | 15.7 | 13.3 | 6.1 | 9.7 | 11.1 | 12.5 | 14.4 | 15.1 | 11.6 | 11.1 | 6.4 | 7.8 | 13.8 | 10.6 | 13.6 | 16.9 | 15.9 | 13.7 | 7.3 | 6 | 5.7 | 4.9 | 9.4 | 5.4 |
| Apparent max temperature | 9.1 | 8.9 | 8.6 | 6.4 | 2.3 | 6 | 13.3 | 13.2 | 11.8 | 1.5 | 5.3 | 8.5 | 9.2 | 10.6 | 10.8 | 7.9 | 7.9 | 2.7 | 2.2 | 10.7 | 7.8 | 11.7 | 15.3 | 12.1 | 11.3 | 2 | 1.5 | 0.3 | 0.5 | 5.5 | 1.6 |
| Mean temperature | 8.5 | 6.7 | 6.4 | 6.4 | 5.4 | 2.1 | 9.5 | 12.2 | 9.6 | 2.6 | 2 | 4.4 | 5 | 5.8 | 9.4 | 8.6 | 5.1 | 2.6 | -0.4 | 5.8 | 7.7 | 10 | 12.3 | 12.6 | 9.8 | 2.2 | 2.5 | 2.1 | 1.4 | 2 | 1.6 |
| Apparent mean temperature | 3.2 | 1.8 | -1 | -1.2 | -0.6 | -6.9 | 0.6 | 6.1 | 1.5 | -6.5 | -7.9 | -3.4 | -3 | -3.2 | 1.9 | 1.8 | -1.7 | -5.3 | -10 | -3.7 | 2.1 | 5.5 | 8.7 | 8.6 | -0.3 | -6.1 | -4.5 | -4.1 | -5.1 | -7 | -6.4 |
| Minimum temperature | 6.6 | 4.4 | 2.9 | 3.5 | 3.5 | -3.6 | 5.4 | 8.8 | 5.7 | -1.7 | -3.3 | 0.5 | 0.6 | 0.7 | 6.1 | 5.6 | 1.6 | 0.3 | -5.1 | 1.8 | 6 | 8 | 10.2 | 10.5 | 4.5 | -1.4 | -0.1 | 0.3 | -0.3 | -2.7 | -2 |
| Apparent min temperature | 5.8 | 4.2 | 3.1 | 2.3 | 0.6 | -1.5 | 5.3 | 9 | 6.8 | -2.1 | -2.3 | 0.8 | 1.6 | 2 | 5.3 | 5.8 | 1.8 | -2.3 | -5.1 | 1.1 | 4.3 | 7.8 | 11 | 10.4 | 6.7 | -2.8 | -1.8 | -2.4 | -3.2 | -1.9 | -2.8 |
| 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) | 9.7 | 9.7 | 9.7 | 9.7 | 9.7 | 9.7 | 9.6 | 9.6 | 9.6 | 9.6 | 9.6 | 9.6 | 9.6 | 9.6 | 9.6 | 9.6 | 9.5 | 9.5 | 9.5 | 9.5 | 9.5 | 9.5 | 9.5 | 9.5 | 9.5 | 9.5 | 9.6 | 9.6 | 9.6 | 9.6 | 9.6 |
| Sunshine duration (h) | 2 | 5.4 | 8.4 | 7 | 8.5 | 8.6 | 8.6 | 2.5 | 7.3 | 8.4 | 8.6 | 8.5 | 7.3 | 8.5 | 6.5 | 2.3 | 8.4 | 8.5 | 8.3 | 7.1 | 2.6 | 1 | 7.4 | 3 | 2.6 | 8 | 2 | 5.4 | 0.9 | 7.4 | 8.5 |
| Precipitation (mm) | 15.4 | 0 | 1.2 | 0.8 | 0.3 | 0 | 0 | 0.3 | 5.5 | 0 | 0 | 0 | 0 | 0 | 0 | 9.6 | 0.2 | 0 | 0 | 0 | 1.8 | 5.1 | 0.9 | 1.8 | 9.5 | 0 | 2.9 | 2.2 | 4.5 | 0 | 0 |
| Precipitation hours | 14 | 0 | 4 | 3 | 1 | 0 | 0 | 2 | 8 | 0 | 0 | 0 | 0 | 0 | 0 | 15 | 2 | 0 | 0 | 0 | 6 | 11 | 7 | 4 | 12 | 0 | 12 | 13 | 13 | 0 | 0 |
| Wind speed (m/s) | 18.2 | 9.7 | 18.1 | 23.2 | 26.4 | 14 | 21.3 | 23.4 | 21.5 | 17.1 | 13.8 | 10.7 | 10.8 | 12.9 | 14.8 | 18.8 | 16.2 | 22.6 | 14.5 | 18.8 | 14.1 | 13.5 | 11.4 | 26.1 | 22.7 | 20.6 | 16.3 | 22.6 | 16.8 | 11.7 | 18.1 |
In December 2023, the highest daytime temperature in Richland was 17.2°C.
While the minimum temperature at night dropped to -5.1°C.
The average nighttime and daytime temperatures during December in Richland are 2.5°C and 10.9°C respectively.
The precipitation sum in December is about 62 mm.