Average temperature in December is 8.4 °C
Average daytime temperature is 13.7 °C
Average night temperature is 4.5 °C
Absolute maximum temperature: 19.9 °C
Absolute minimum temperature: -2.8 °C
Number of sunny days: 20
Number of rainy days: 11
Number of snow days:
Precipitation sum: 49 mm
* Weather data for Somerville 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 | 19.9 | 17.6 | 15.3 | 13 | 14.3 | 9.4 | 14.9 | 15.6 | 19 | 14.4 | 11.5 | 14.2 | 14.7 | 17.1 | 16.5 | 12.6 | 11.9 | 8.9 | 8.1 | 11.8 | 13.6 | 16.1 | 18.5 | 18.6 | 17.5 | 12.8 | 12.1 | 8.2 | 5.3 | 9.8 | 13 |
| Apparent max temperature | 18.7 | 17.3 | 12.9 | 8.7 | 9.4 | 6.5 | 10.8 | 13.2 | 18.7 | 13.8 | 7.9 | 11.2 | 11.6 | 14.1 | 12.8 | 10.3 | 9.5 | 3.7 | 4.5 | 8.2 | 10.6 | 13.9 | 17.5 | 16 | 14.8 | 10.3 | 8 | 3.5 | 2 | 6 | 9.7 |
| Mean temperature | 12 | 13.4 | 10.4 | 10 | 7.9 | 6.3 | 6.8 | 10.8 | 15.9 | 8.4 | 4.4 | 6.6 | 7.7 | 9.4 | 10.1 | 11.2 | 8.4 | 5.5 | 2.2 | 4.6 | 6.7 | 8.7 | 12.9 | 13.9 | 15 | 7.2 | 6.5 | 3.6 | 3 | 4.3 | 6.6 |
| Apparent mean temperature | 2.9 | 7.6 | 4.6 | 4.1 | -0.1 | -0.8 | -0.9 | 2.8 | 10.6 | -0.3 | -3.8 | -2.7 | -0.2 | 0.5 | 1.5 | 6 | 0.5 | -0.5 | -7 | -4.1 | -2.1 | 0.4 | 7 | 8.4 | 10.7 | -0.7 | -1 | -4.4 | -4.1 | -4.2 | -1.2 |
| Minimum temperature | 6.2 | 9.3 | 6.7 | 7.8 | 3.5 | 3 | 2.5 | 6.8 | 13.3 | 4.2 | -0.7 | 1.4 | 2.9 | 4.6 | 5.9 | 9.1 | 4.1 | 3.5 | -2.8 | 0.7 | 2 | 4 | 10 | 10.8 | 13.4 | 2.6 | 2.7 | -0.3 | 0.1 | -0.4 | 2.9 |
| Apparent min temperature | 9.4 | 12.7 | 8.4 | 6.3 | 4.3 | 2.4 | 3.3 | 7 | 14.6 | 4.4 | 1.2 | 3 | 4.6 | 5.9 | 6.3 | 7.7 | 5.7 | 1.6 | -2 | 0.3 | 3 | 5.6 | 10.6 | 11.8 | 12.8 | 4.1 | 2.7 | -0.5 | -1 | 0.6 | 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) | 10 | 9.9 | 9.9 | 9.9 | 9.9 | 9.9 | 9.9 | 9.9 | 9.8 | 9.8 | 9.8 | 9.8 | 9.8 | 9.8 | 9.8 | 9.8 | 9.8 | 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 |
| Sunshine duration (h) | 4.1 | 6 | 8.8 | 8.9 | 8.9 | 8.9 | 8.7 | 5.8 | 0.5 | 8.9 | 8.8 | 8.8 | 7.3 | 8.8 | 8.6 | 0.2 | 8.8 | 8.8 | 8.8 | 6.6 | 7.8 | 8.8 | 6.4 | 4.9 | 6 | 8.8 | 8.1 | 2 | 0 | 8.9 | 8.7 |
| Precipitation (mm) | 7.4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 22.1 | 0.3 | 0 | 0 | 0 | 0 | 0 | 1.3 | 0.7 | 0 | 0 | 0 | 0 | 0 | 0.9 | 0.1 | 14.7 | 0 | 0 | 0.2 | 1 | 0.3 | 0 |
| Precipitation hours | 12 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 10 | 2 | 0 | 0 | 0 | 0 | 0 | 10 | 3 | 0 | 0 | 0 | 0 | 0 | 4 | 1 | 13 | 0 | 0 | 2 | 6 | 2 | 0 |
| Wind speed (m/s) | 22.9 | 13.2 | 14.3 | 19.8 | 27.7 | 19.2 | 14.1 | 19.8 | 26 | 18.8 | 11 | 11.5 | 10.1 | 13.1 | 14.5 | 20.9 | 14.1 | 19.9 | 14 | 12.9 | 11.8 | 11.3 | 14.6 | 19 | 27.8 | 16.9 | 21 | 17.3 | 16 | 12.5 | 14.7 |
In December 2023, the highest daytime temperature in Somerville was 19.9°C.
While the minimum temperature at night dropped to -2.8°C.
The average nighttime and daytime temperatures during December in Somerville are 4.5°C and 13.7°C respectively.
The precipitation sum in December is about 49 mm.