Average temperature in December is -1.9 °C
Average daytime temperature is 3.4 °C
Average night temperature is -6.8 °C
Absolute maximum temperature: 10.5 °C
Absolute minimum temperature: -13.3 °C
Number of sunny days: 23
Number of rainy days: 5
Number of snow days: 3
Precipitation sum: 53 mm
* Weather data for Riverside 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 | 3.7 | 1.8 | 3.1 | 4 | 8.3 | 6.8 | 10.5 | 9.5 | 3.1 | 4.3 | 4.8 | 10.5 | 4.9 | 1 | 0.5 | -0.5 | 2.5 | 0.8 | -0.2 | 1.1 | 2.1 | 0.9 | 5.3 | 1.5 | -2.4 | -0.2 | 2.4 | 2.6 | 3.3 | 3.9 | 5.1 |
| Apparent max temperature | -0.7 | -1.6 | -0.9 | 0.9 | 4.4 | 3.1 | 7.2 | 5.2 | -2 | -0.2 | 1 | 4.2 | 0.9 | -1.9 | -2.6 | -4.6 | -1.3 | -3.2 | -3.1 | -1.8 | -0.7 | -1.8 | 3.1 | -0.9 | -6.4 | -5.2 | -1.1 | -1.5 | -1 | -0.3 | 1.4 |
| Mean temperature | 0.4 | -1.4 | -2.5 | -1.2 | -0.8 | 0.3 | 3.2 | 4.3 | -2 | -3.2 | -1.8 | 1.9 | 2.6 | -1 | -3.3 | -6.9 | -4.6 | -6.6 | -4.4 | -1.3 | 0.3 | -3.3 | 2.2 | -0.3 | -7.6 | -6.5 | -5.4 | -4.4 | -4.5 | -1.9 | -0.5 |
| Apparent mean temperature | -7.5 | -8.6 | -12.9 | -11 | -12.2 | -8.7 | -7.3 | -6.2 | -12.3 | -12 | -9.4 | -6.4 | -3.6 | -6.8 | -14 | -17.3 | -18.4 | -18.6 | -14.8 | -12.9 | -5.3 | -13.5 | -4.6 | -7.9 | -16.1 | -16.1 | -14.5 | -15.6 | -15.2 | -12.2 | -10.3 |
| Minimum temperature | -3.4 | -4.5 | -7.8 | -6.4 | -7.6 | -4.9 | -3.2 | -2.1 | -6.6 | -7.4 | -5.6 | -2.5 | 0.2 | -3 | -8.7 | -12.2 | -12.7 | -13.3 | -9.9 | -8.1 | -1.7 | -8.9 | -0.9 | -3.4 | -11.1 | -11.2 | -9.3 | -10.5 | -10.3 | -8 | -6.3 |
| Apparent min temperature | -3.3 | -5.5 | -6.8 | -5.4 | -4.8 | -3.4 | -0.6 | 0.3 | -7.1 | -7.8 | -5.9 | -2.4 | -0.9 | -4.2 | -7.6 | -11.2 | -8.8 | -10.9 | -8.2 | -4.7 | -2.6 | -6.8 | -1.2 | -4 | -11.9 | -11.5 | -9.9 | -8.8 | -9 | -6 | -4.4 |
| 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) | 9.9 | 9.9 | 9.9 | 9.9 | 9.8 | 9.8 | 9.8 | 9.8 | 9.8 | 9.8 | 9.8 | 9.8 | 9.7 | 9.7 | 9.7 | 9.7 | 9.7 | 9.7 | 9.7 | 9.7 | 9.7 | 9.7 | 9.7 | 9.7 | 9.7 | 9.7 | 9.7 | 9.7 | 9.7 | 9.7 | 9.8 |
| Sunshine duration (h) | 8.6 | 8.8 | 8.9 | 8.7 | 8.9 | 8.9 | 8.9 | 8.7 | 8.8 | 8.8 | 8.4 | 7.4 | 3.8 | 4.2 | 8.5 | 8.8 | 8.8 | 8.5 | 8.6 | 6.6 | 8.2 | 8.6 | 4.2 | 8.3 | 8.8 | 8.7 | 8.7 | 8.8 | 8.8 | 8.5 | 8.2 |
| Precipitation (mm) | 1.8 | 0 | 0 | 0 | 0 | 0 | 0 | 0.3 | 0 | 0 | 0 | 0 | 7.4 | 30.9 | 0 | 0 | 0 | 0 | 0 | 0 | 0.1 | 0 | 7.3 | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 0.1 |
| Precipitation hours | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 0 | 8 | 16 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 10 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| Wind speed (m/s) | 22 | 19.1 | 12.3 | 13.2 | 11.9 | 8 | 9.1 | 19.6 | 18.2 | 17.7 | 11.1 | 23.4 | 10 | 11.7 | 14.3 | 10.6 | 13.9 | 11.3 | 9.8 | 10.4 | 8.4 | 10 | 25.6 | 15.6 | 12.3 | 18.9 | 12.5 | 11.6 | 12.3 | 8.5 | 8.5 |
In December 2023, the highest daytime temperature in Riverside was 10.5°C.
While the minimum temperature at night dropped to -13.3°C.
The average nighttime and daytime temperatures during December in Riverside are -6.8°C and 3.4°C respectively.
The precipitation sum in December is about 53 mm.