Average temperature in January is -2.3 °C
Average daytime temperature is 1.4 °C
Average night temperature is -5.1 °C
Absolute maximum temperature: 9.3 °C
Absolute minimum temperature: -26.4 °C
Number of sunny days: 12
Number of rainy days: 11
Number of snow days: 8
Precipitation sum: 61 mm
* Weather data for Janesville United States is based on climate observations for 2023 year
| Gennaio (°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 | 7.5 | 2.4 | 4.2 | 2.4 | 1.4 | 0.2 | 0.5 | 0.4 | 5.5 | 6.6 | 9.3 | 5.8 | 0.8 | 0.4 | 5.6 | 7 | 8.2 | 3.3 | 3.4 | 1 | 0.2 | -1.2 | -0.4 | 3.9 | 0.7 | -0.8 | 2.2 | -4.3 | -6.8 | -12.3 | -12.4 |
| Apparent max temperature | 4.9 | -0.8 | 1.2 | -0.3 | -2.5 | -3.4 | -2.7 | -3.7 | 1.1 | 3.7 | 7.1 | 3.3 | -3.8 | -4.2 | -0.4 | 3.3 | 4.8 | -0.7 | 0.1 | -3 | -3.9 | -5.1 | -6.2 | -0.3 | -3.5 | -4.6 | -3 | -10 | -11.7 | -16.8 | -17.7 |
| Mean temperature | 1.9 | 0.7 | 1.7 | 1.5 | -0.4 | -1.1 | -4.9 | -4.8 | -2.7 | 2 | 2.2 | 1.4 | -1.2 | -3.9 | -0.9 | 4 | 4.3 | 1.7 | 1.4 | -0.5 | -3.1 | -2.9 | -4.5 | -1.9 | -1.4 | -1.5 | -6 | -8.2 | -9.1 | -14.5 | -19.2 |
| Apparent mean temperature | -5.1 | -5.3 | -4.7 | -4.5 | -5.6 | -8.2 | -12.7 | -11.9 | -11.1 | -5.8 | -4.8 | -5.8 | -8.9 | -10.7 | -9.6 | -3 | -2.3 | -3.4 | -6.5 | -7.4 | -9.5 | -7.6 | -11.9 | -10.3 | -6.9 | -7.4 | -17.8 | -15.5 | -17.1 | -22.6 | -31.5 |
| Minimum temperature | -1.7 | -1.5 | -0.5 | 0 | -1.4 | -4.1 | -8.6 | -7.7 | -6.5 | -2.3 | -1.5 | -1.3 | -3.4 | -6.9 | -3.9 | 2.6 | 2.2 | 0.4 | -0.1 | -1.9 | -5.5 | -4 | -6.9 | -5.9 | -3.3 | -2.5 | -12.2 | -11.3 | -11 | -16.9 | -26.4 |
| Apparent min temperature | -1.7 | -2.7 | -2.3 | -2.2 | -4.6 | -5.2 | -9 | -8.7 | -7.2 | -1.6 | -0.7 | -3.1 | -6.6 | -8.2 | -6.6 | -0.9 | 0.1 | -2.3 | -2.7 | -5.5 | -7.1 | -6.5 | -9.5 | -6.5 | -5.5 | -5.8 | -11.9 | -13 | -14.8 | -20 | -24.4 |
| Gennaio | 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) | 9.1 | 9.1 | 9.1 | 9.1 | 9.2 | 9.2 | 9.2 | 9.2 | 9.2 | 9.3 | 9.3 | 9.3 | 9.3 | 9.4 | 9.4 | 9.4 | 9.4 | 9.5 | 9.5 | 9.5 | 9.6 | 9.6 | 9.6 | 9.7 | 9.7 | 9.7 | 9.8 | 9.8 | 9.9 | 9.9 | 9.9 |
| Sunshine duration (h) | 7.8 | 0 | 0 | 0 | 0 | 2.5 | 8 | 8 | 8 | 8 | 6 | 0.1 | 4.7 | 8.1 | 6.8 | 0 | 0 | 0 | 0 | 1.1 | 3.4 | 0.8 | 5.8 | 8.4 | 0 | 0 | 1.5 | 0 | 5.5 | 8.7 | 8.7 |
| Precipitation (mm) | 4.4 | 0 | 13.4 | 1 | 1.4 | 0.5 | 0 | 0 | 0 | 0 | 0.1 | 0.2 | 0.9 | 0 | 0 | 7 | 2.1 | 0 | 7.4 | 0.9 | 0 | 2.2 | 0 | 0 | 4.3 | 2.9 | 0.8 | 4.5 | 6.9 | 0.2 | 0 |
| Precipitation hours | 8 | 0 | 12 | 6 | 12 | 4 | 0 | 0 | 0 | 0 | 1 | 2 | 7 | 0 | 0 | 13 | 9 | 0 | 15 | 7 | 0 | 16 | 0 | 0 | 13 | 22 | 3 | 9 | 12 | 2 | 0 |
| Wind speed (m/s) | 16.9 | 11.2 | 22 | 14.3 | 14.1 | 12.9 | 9.8 | 9.6 | 12.8 | 16.6 | 8.3 | 24.9 | 21.3 | 12.3 | 22.3 | 21.7 | 23.5 | 18 | 27.4 | 19.9 | 11.5 | 11.1 | 20.4 | 21 | 16.1 | 16.2 | 32.9 | 19.6 | 18.7 | 15.6 | 11.3 |
In January 2023, the highest daytime temperature in Janesville was 9.3°C.
While the minimum temperature at night dropped to -26.4°C.
The average nighttime and daytime temperatures during January in Janesville are -5.1°C and 1.4°C respectively.
The precipitation sum in January is about 61 mm.