Average temperature in January is 0.1 °C
Average daytime temperature is 5 °C
Average night temperature is -3.5 °C
Absolute maximum temperature: 12.3 °C
Absolute minimum temperature: -13 °C
Number of sunny days: 20
Number of rainy days: 8
Number of snow days: 3
Precipitation sum: 47 mm
* Weather data for Ontario 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 | 10.5 | 7.1 | 6.5 | 4.5 | 4.9 | 8.8 | 3.4 | 7.2 | 10.4 | 11.5 | 8.6 | 5.1 | 1.6 | 6.8 | 11.8 | 12.3 | 8.1 | 3.2 | 2.9 | 5.7 | 1.5 | 0.8 | 3.3 | 4.8 | 0.8 | 1.2 | 8.2 | 9.3 | -5.6 | -6.1 | -2.9 |
| Apparent max temperature | 7.7 | 4.7 | 4.1 | -1.4 | 0.1 | 3.8 | -1 | 3 | 6.3 | 8.3 | 4.7 | 0.4 | -2.2 | 1.7 | 7.6 | 8 | 5.6 | -0.8 | -1 | 2.8 | -1.2 | -2.9 | -1.7 | 1.7 | -2.3 | -3.8 | 3.5 | 6.5 | -12.3 | -11.8 | -8.2 |
| Mean temperature | 3.8 | 4.3 | 4.1 | 0.5 | 0.7 | 0.5 | -0.3 | -0.6 | 3.4 | 4.2 | 4.7 | -0.2 | -3.6 | -1.2 | 5.7 | 9.7 | 3.5 | 1.5 | 1.1 | -0.9 | -0.5 | -1.1 | -4.4 | -0.7 | -0.7 | -4.7 | 2.1 | 2.6 | -9.6 | -10.1 | -9.2 |
| Apparent mean temperature | -4 | -2 | -4.9 | -7.3 | -7.8 | -8.6 | -7.4 | -9.1 | -4.6 | -5.9 | -3 | -9.8 | -11.4 | -9.4 | -3 | -2.3 | -4.2 | -4.9 | -6.7 | -8.8 | -6.5 | -8 | -17.5 | -7.9 | -9.1 | -13.5 | -8.4 | -7.6 | -19.8 | -18.7 | -16.9 |
| Minimum temperature | -0.5 | 1.9 | 0.7 | -1.9 | -2.1 | -4.4 | -2.4 | -5.2 | -0.5 | -2.3 | 0.7 | -3 | -6.9 | -5.2 | 2.2 | 3.5 | -0.4 | 0.3 | -0.7 | -4.9 | -2.5 | -4.1 | -12.3 | -4.7 | -2.8 | -8.4 | -4.2 | -1.1 | -13 | -12.9 | -12.5 |
| Apparent min temperature | 0.8 | 0.8 | 0.2 | -5.2 | -4.9 | -3.7 | -5.1 | -4.5 | -0.6 | 0.6 | 1.2 | -6.5 | -8.3 | -6.2 | 0.5 | 4.9 | 0.1 | -2.9 | -3.9 | -4.7 | -3.7 | -4.8 | -8.8 | -4.2 | -5.2 | -10.1 | -3.1 | -1.3 | -16.5 | -16.3 | -14 |
| 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) | 9.4 | 9.4 | 9.5 | 9.5 | 9.5 | 9.5 | 9.5 | 9.5 | 9.6 | 9.6 | 9.6 | 9.6 | 9.6 | 9.7 | 9.7 | 9.7 | 9.7 | 9.8 | 9.8 | 9.8 | 9.8 | 9.9 | 9.9 | 9.9 | 10 | 10 | 10 | 10.1 | 10.1 | 10.1 | 10.2 |
| Sunshine duration (h) | 8.4 | 0 | 0 | 6.8 | 8.5 | 7.9 | 3.5 | 8.5 | 8.6 | 7.9 | 6.1 | 6.9 | 8.6 | 6.4 | 5.8 | 8.7 | 8.8 | 0 | 7 | 8.8 | 0 | 6.3 | 8 | 3.7 | 3.9 | 7.6 | 8.9 | 8.8 | 5.4 | 9 | 9.1 |
| Precipitation (mm) | 0 | 7.3 | 7.1 | 0 | 0 | 0 | 0.4 | 0.1 | 0 | 0 | 0 | 5.8 | 0 | 0 | 0 | 0.2 | 0 | 9.6 | 3.2 | 0 | 6.2 | 5.2 | 0 | 0 | 1.8 | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation hours | 0 | 6 | 8 | 0 | 0 | 0 | 2 | 1 | 0 | 0 | 0 | 7 | 0 | 0 | 0 | 2 | 0 | 9 | 7 | 0 | 9 | 9 | 0 | 0 | 12 | 0 | 0 | 0 | 0 | 0 | 0 |
| Wind speed (m/s) | 14.3 | 18.6 | 26.1 | 24.6 | 22.6 | 15.3 | 17.6 | 11.6 | 16.6 | 15.1 | 14.8 | 31.5 | 17.3 | 20.6 | 26.2 | 29.9 | 13.2 | 21.7 | 28.7 | 15.5 | 10 | 10.5 | 15.4 | 9.1 | 26.2 | 20.4 | 24.2 | 24.5 | 25.6 | 20 | 10.6 |
In January 2023, the highest daytime temperature in Ontario was 12.3°C.
While the minimum temperature at night dropped to -13°C.
The average nighttime and daytime temperatures during January in Ontario are -3.5°C and 5°C respectively.
The precipitation sum in January is about 47 mm.