Average temperature in December is -2.8 °C
Average daytime temperature is 1.4 °C
Average night temperature is -6.3 °C
Absolute maximum temperature: 11 °C
Absolute minimum temperature: -14.2 °C
Number of sunny days: 23
Number of rainy days: 3
Number of snow days: 5
Precipitation sum: 24 mm
* Weather data for Wilton 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 | 0.1 | 1.6 | 3.4 | 0.7 | 2.4 | 11 | 5.3 | 2.6 | -1 | -1.9 | -0.1 | -3.1 | 2 | 3.4 | 1.8 | 0.4 | 0.8 | -2.2 | 1.5 | 0.4 | 4 | 4.2 | 2.4 | -1 | -1.6 | -1.4 | 2.4 | 3.9 | 4.9 | -0.4 | -1.8 |
| Apparent max temperature | -5.4 | -3.5 | -1.5 | -3.2 | -2.5 | 8 | 2 | -1.9 | -7.7 | -6.7 | -6 | -8.9 | -2.9 | -0.8 | -2.7 | -4.4 | -4.6 | -9.3 | -2 | -4.5 | 0.4 | 0.5 | -0.4 | -4.7 | -7.9 | -6.9 | -2.3 | 0.4 | -0.3 | -5.1 | -6.5 |
| Mean temperature | -4.3 | -3.2 | -2.3 | -2.7 | -2.6 | 3.6 | 2.9 | 1 | -3.1 | -6.6 | -5.3 | -7.7 | -5 | -0.4 | -1.8 | -5.4 | -1.8 | -6.5 | -2.6 | -3.1 | -1.2 | -0.8 | -0.1 | -1.9 | -6.2 | -2.7 | -1.6 | -3.8 | -0.2 | -3.1 | -7.2 |
| Apparent mean temperature | -12 | -12.2 | -10.7 | -10.4 | -10.2 | -5.9 | -4.8 | -7.8 | -12.4 | -16.3 | -14.8 | -19.7 | -13.7 | -7.9 | -8.6 | -19 | -9.8 | -16.9 | -10.6 | -11.6 | -8 | -7.5 | -6.1 | -9.9 | -15.8 | -10.1 | -10.2 | -12.3 | -7.1 | -11.3 | -15.8 |
| Minimum temperature | -7.2 | -6.5 | -6.2 | -6 | -6.3 | 0 | -1 | -0.6 | -5.1 | -11 | -9.7 | -14.2 | -8.9 | -2.3 | -4.9 | -13.5 | -4.6 | -11.9 | -5.8 | -6.2 | -2.9 | -3.9 | -1.5 | -3.7 | -10.4 | -3.3 | -5.4 | -7.8 | -2.9 | -5.3 | -11.4 |
| Apparent min temperature | -8.9 | -8.9 | -7.1 | -7.1 | -7 | -0.8 | -0.8 | -4.9 | -10.2 | -11.3 | -10.5 | -13.4 | -9.9 | -5.7 | -6 | -10.1 | -6.7 | -12.4 | -7.3 | -8.2 | -6 | -4.6 | -4.2 | -7.9 | -12 | -9.1 | -6.6 | -7.9 | -4.9 | -8.9 | -11.7 |
| 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) | 6.2 | 7.3 | 6.3 | 2 | 7.1 | 7.1 | 7.2 | 0 | 7.3 | 2.9 | 3.5 | 5.2 | 7.3 | 7 | 0 | 7.2 | 4.3 | 7.2 | 2.4 | 7.2 | 5.9 | 7.2 | 7 | 4.7 | 5 | 0 | 7.3 | 7.3 | 7.3 | 3.4 | 7.3 |
| Precipitation (mm) | 0 | 0 | 0 | 0.4 | 0 | 0 | 0 | 11.1 | 4.9 | 0 | 0 | 0 | 0 | 0 | 1.6 | 0.1 | 0.4 | 0 | 0 | 0 | 0 | 0 | 0 | 0.5 | 0 | 4.7 | 0 | 0 | 0 | 0 | 0 |
| Precipitation hours | 0 | 0 | 0 | 4 | 0 | 0 | 0 | 17 | 5 | 0 | 0 | 0 | 0 | 0 | 5 | 1 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 4 | 0 | 18 | 0 | 0 | 0 | 0 | 0 |
| Wind speed (m/s) | 17.2 | 20.9 | 17.6 | 15.5 | 20.6 | 24.6 | 17.8 | 33 | 39.2 | 14.5 | 25.4 | 30.1 | 18.8 | 23.3 | 16.6 | 16.9 | 32.2 | 28.8 | 27.1 | 17.1 | 19.8 | 10.8 | 15.5 | 28.4 | 20.9 | 26.3 | 18.5 | 10.7 | 18.7 | 23.6 | 17.3 |
In December 2023, the highest daytime temperature in Wilton was 11°C.
While the minimum temperature at night dropped to -14.2°C.
The average nighttime and daytime temperatures during December in Wilton are -6.3°C and 1.4°C respectively.
The precipitation sum in December is about 24 mm.