Average temperature in January is -6.8 °C
Average daytime temperature is -3.8 °C
Average night temperature is -9.4 °C
Absolute maximum temperature: 2.6 °C
Absolute minimum temperature: -23.8 °C
Number of sunny days: 16
Number of rainy days: 3
Number of snow days: 12
Precipitation sum: 66 mm
* Weather data for Hayward 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 | 0.4 | -1 | -1.4 | -0.5 | -1.6 | -5.7 | -7 | -5.3 | -4.2 | -0.5 | 0.4 | -1.5 | -4.4 | -2.2 | 2.6 | 2.4 | 1.1 | 0.5 | -1.2 | -2.8 | -4.4 | -5.9 | -4.4 | -2.6 | -1.8 | -3.6 | -4.7 | -9.6 | -16.6 | -18.6 | -14.5 |
| Apparent max temperature | -4.2 | -5.5 | -5.9 | -5.6 | -7.3 | -9.9 | -11.1 | -10 | -8.9 | -3.2 | -2.4 | -5.4 | -9.1 | -7.4 | -2.1 | -1.2 | -2.4 | -3.7 | -6.4 | -8.3 | -8.8 | -9.7 | -9 | -6.5 | -5.4 | -8.1 | -11.1 | -15.9 | -21.1 | -24.1 | -20.3 |
| Mean temperature | -0.8 | -3.4 | -4.8 | -1 | -3.3 | -12.6 | -11.9 | -9.7 | -8.4 | -2.3 | -1.4 | -2.5 | -6.1 | -7.6 | -1.3 | 0.7 | 0.5 | -1.5 | -2.3 | -5.9 | -6.2 | -7.9 | -8.4 | -4.6 | -3.7 | -7.8 | -9.6 | -15.4 | -19.6 | -20.4 | -20.6 |
| Apparent mean temperature | -7.2 | -9 | -11.8 | -7.4 | -9.9 | -21.3 | -21.3 | -17.6 | -16.8 | -8.3 | -5.7 | -8.9 | -11.4 | -15.6 | -9.4 | -5.3 | -4.2 | -7.3 | -8.9 | -13.6 | -11.8 | -14.8 | -15.7 | -11.8 | -9.6 | -16.6 | -20 | -24.9 | -28.2 | -29.1 | -29.7 |
| Minimum temperature | -1.9 | -5.1 | -7.4 | -1.8 | -5.6 | -16.4 | -15.9 | -12.3 | -12.2 | -3.6 | -2.6 | -3.9 | -7.3 | -10 | -3.1 | -0.6 | 0 | -2.9 | -3.5 | -8.7 | -7.2 | -10.3 | -10.1 | -6.9 | -5 | -12.1 | -13.1 | -20.3 | -23.3 | -23.8 | -23.8 |
| Apparent min temperature | -5.2 | -7.3 | -9.5 | -6.3 | -8.3 | -17.1 | -16.6 | -14.8 | -12.9 | -6.5 | -4.4 | -7 | -10.4 | -12.7 | -7 | -3.7 | -3.3 | -5.7 | -7.5 | -10.7 | -10.8 | -11.9 | -13.4 | -9.1 | -7.6 | -12.7 | -15.9 | -20.7 | -24.7 | -26.1 | -26.3 |
| 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) | 8.7 | 8.7 | 8.7 | 8.8 | 8.8 | 8.8 | 8.8 | 8.9 | 8.9 | 8.9 | 8.9 | 9 | 9 | 9 | 9 | 9.1 | 9.1 | 9.1 | 9.2 | 9.2 | 9.2 | 9.3 | 9.3 | 9.4 | 9.4 | 9.4 | 9.5 | 9.5 | 9.6 | 9.6 | 9.7 |
| Sunshine duration (h) | 0 | 1 | 0 | 0 | 0.2 | 6.4 | 5.1 | 7.6 | 0.2 | 0 | 1 | 0 | 3.2 | 7.3 | 4.6 | 0 | 0 | 3.6 | 0 | 2.6 | 0 | 0.4 | 0.4 | 5.6 | 0 | 7.8 | 2.6 | 8 | 8.1 | 8.5 | 8.6 |
| Precipitation (mm) | 0.1 | 0 | 7.1 | 19 | 4.6 | 0 | 0 | 0 | 0 | 0 | 0.5 | 0.2 | 0 | 0 | 0 | 6.1 | 9.5 | 0.4 | 8.2 | 0.5 | 0 | 0 | 0.7 | 0 | 3.3 | 2.2 | 3.1 | 0 | 0 | 0 | 0 |
| Precipitation hours | 1 | 0 | 5 | 20 | 16 | 0 | 0 | 0 | 0 | 0 | 5 | 1 | 0 | 0 | 0 | 12 | 17 | 4 | 15 | 4 | 0 | 0 | 4 | 0 | 17 | 10 | 10 | 0 | 0 | 0 | 0 |
| Wind speed (m/s) | 17.8 | 13.8 | 25.3 | 24 | 22.4 | 10.1 | 11.7 | 13 | 14.1 | 15.6 | 8.2 | 15.9 | 14.9 | 18.2 | 23.9 | 16.5 | 15.3 | 15.3 | 20 | 20.9 | 12.5 | 10.5 | 16 | 16.1 | 12.6 | 17.7 | 26.1 | 19.1 | 12.2 | 17.1 | 13.8 |
In January 2023, the highest daytime temperature in Hayward was 2.6°C.
While the minimum temperature at night dropped to -23.8°C.
The average nighttime and daytime temperatures during January in Hayward are -9.4°C and -3.8°C respectively.
The precipitation sum in January is about 66 mm.