Average temperature in December is 1.6 °C
Average daytime temperature is 6.1 °C
Average night temperature is -1.4 °C
Absolute maximum temperature: 13 °C
Absolute minimum temperature: -7.5 °C
Number of sunny days: 18
Number of rainy days: 9
Number of snow days: 4
Precipitation sum: 34 mm
* Weather data for Janesville United States is based on climate observations for 2023 year
| Dicembre (°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 | 3.6 | 3.2 | 4.9 | 3.4 | 1.9 | 7 | 11.2 | 11.8 | 6.9 | 1 | 3.1 | 0.7 | 6.2 | 8.8 | 8.4 | 6.4 | 6.4 | 2.9 | 3.6 | 6.1 | 5.9 | 10.7 | 11.9 | 13 | 12.5 | 11.2 | 3.2 | 2.7 | 4.7 | 4.8 | 0.4 |
| Apparent max temperature | -2.2 | -0.8 | 0.9 | -1 | -2.1 | 0.9 | 7.5 | 7.6 | 3.7 | -4.3 | -1.4 | -4.4 | 0.9 | 4.6 | 5.2 | 3.9 | 2.2 | -1.8 | -2.6 | 1.4 | 2.4 | 8.4 | 8.7 | 9.6 | 9.9 | 8.4 | -0.8 | -1.3 | 0.5 | -0.4 | -5.9 |
| Mean temperature | -0.3 | -0.3 | 1.1 | -1.6 | -0.3 | -1.3 | 3.8 | 8 | 3.8 | -2.3 | -4.1 | -1.4 | -1.7 | 0.7 | 3.7 | 4.7 | 3.9 | -2.3 | -4.1 | 0.1 | 2.5 | 6.1 | 7.9 | 9 | 11.5 | 2.6 | 0.3 | 0 | -0.3 | -0.6 | -1.5 |
| Apparent mean temperature | -8.3 | -8 | -4.7 | -9.1 | -7.3 | -9.7 | -4.2 | 0.8 | -5.8 | -10.8 | -11.7 | -10.7 | -10.7 | -7.8 | -2.9 | 0.2 | -2.2 | -14.2 | -13.3 | -8 | -4.4 | 1.1 | 4.4 | 3.7 | 6 | -5.3 | -6.9 | -8.1 | -7.9 | -7.1 | -9.2 |
| Minimum temperature | -2.3 | -3.9 | -1.3 | -5.3 | -3.3 | -5.6 | -0.7 | 4.9 | 1.2 | -5.6 | -7.5 | -5 | -5.9 | -3.7 | 0.6 | 3.7 | 1.6 | -5.5 | -7.5 | -3.6 | 0.3 | 3.8 | 6.1 | 6.8 | 10.1 | 0.4 | -2.7 | -3.1 | -3 | -3.3 | -3.2 |
| Apparent min temperature | -5.6 | -4.4 | -2.1 | -5.4 | -4.7 | -5.9 | 0 | 4.1 | -1.4 | -8.1 | -8.2 | -6.9 | -6.6 | -3.4 | 0.1 | 1.8 | 0 | -9.5 | -9.7 | -4.7 | -1.9 | 3.3 | 5.7 | 5.6 | 8.1 | -2.4 | -4 | -5.1 | -5.1 | -5 | -7.5 |
| Dicembre | 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) | 9.3 | 9.3 | 9.2 | 9.2 | 9.2 | 9.2 | 9.2 | 9.2 | 9.1 | 9.1 | 9.1 | 9.1 | 9.1 | 9.1 | 9.1 | 9.1 | 9.1 | 9.1 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9.1 | 9.1 | 9.1 | 9.1 | 9.1 | 9.1 |
| Sunshine duration (h) | 2.4 | 0.3 | 7 | 4.4 | 2 | 6.5 | 8 | 7.2 | 0.1 | 8 | 8 | 7.9 | 7.9 | 7.9 | 2 | 0 | 7.9 | 7.9 | 4.2 | 7.8 | 0 | 2.4 | 4 | 0 | 0 | 0 | 0.3 | 0.7 | 7.9 | 7.7 | 2.6 |
| Precipitation (mm) | 0 | 0 | 0.1 | 0 | 1.1 | 0 | 0 | 0 | 0.4 | 0 | 0 | 0 | 0 | 0 | 0 | 4.8 | 0.2 | 0 | 0 | 0 | 0 | 0.1 | 1.8 | 1.1 | 20.6 | 2.3 | 0.8 | 0.2 | 0 | 0 | 0.7 |
| Precipitation hours | 0 | 0 | 1 | 0 | 4 | 0 | 0 | 0 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 15 | 2 | 0 | 0 | 0 | 0 | 1 | 7 | 2 | 20 | 5 | 7 | 2 | 0 | 0 | 7 |
| Wind speed (m/s) | 21.3 | 13 | 10.8 | 18.7 | 22.3 | 23.9 | 17.1 | 19.7 | 31.6 | 30.4 | 11.5 | 19.9 | 12 | 11.6 | 12.7 | 14.4 | 20.2 | 35.7 | 20.1 | 15.6 | 14.2 | 16.3 | 16.8 | 27.1 | 31.2 | 20.5 | 16.9 | 22.8 | 23.7 | 20.4 | 27.6 |
In December 2023, the highest daytime temperature in Janesville was 13°C.
While the minimum temperature at night dropped to -7.5°C.
The average nighttime and daytime temperatures during December in Janesville are -1.4°C and 6.1°C respectively.
The precipitation sum in December is about 34 mm.