Average temperature in January is 9.5 °C
Average daytime temperature is 15 °C
Average night temperature is 5.3 °C
Absolute maximum temperature: 21.2 °C
Absolute minimum temperature: -4.5 °C
Number of sunny days: 16
Number of rainy days: 15
Number of snow days:
Precipitation sum: 134 mm
* Weather data for Washington 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 | 17.5 | 20.6 | 18.9 | 19.6 | 17 | 13.6 | 15.3 | 15.5 | 14 | 14.5 | 17.9 | 20.5 | 13 | 7.2 | 11.7 | 14.7 | 15.1 | 17.3 | 21.2 | 17.6 | 10.3 | 8 | 10.7 | 11.4 | 17.8 | 14.9 | 9.4 | 13 | 13.6 | 15.4 | 18.4 |
| Apparent max temperature | 17 | 21.5 | 19.8 | 20.3 | 16.5 | 10 | 13.1 | 14 | 11.9 | 11.3 | 16.5 | 19.7 | 11.4 | 2.1 | 8.6 | 11.6 | 14.7 | 18.3 | 19.8 | 13.7 | 6.4 | 6.7 | 6.1 | 8.3 | 16.8 | 13.6 | 5.2 | 10.4 | 12.9 | 15 | 19.1 |
| Mean temperature | 13.1 | 12.7 | 15.7 | 17.3 | 12.4 | 8.8 | 8.1 | 10.1 | 10.4 | 6.9 | 9.3 | 15.5 | 10 | 3.9 | 2.6 | 5.4 | 10.3 | 12.4 | 16.4 | 12.2 | 7.7 | 6 | 7.1 | 3.2 | 10.9 | 7.3 | 3.9 | 5.2 | 7.2 | 10.3 | 12.5 |
| Apparent mean temperature | 8.7 | 6.2 | 12.6 | 16.6 | 4.9 | 0.3 | -0.3 | 4.2 | 3 | -1.8 | -0.2 | 11.4 | 2.1 | -4 | -8.3 | -4.7 | 3.4 | 6.2 | 11.9 | 3.6 | 0.7 | 1.1 | 0.4 | -7.5 | 2 | -1.3 | -4.7 | -3.9 | -1.3 | 6.4 | 7.7 |
| Minimum temperature | 10 | 7.1 | 13 | 15.7 | 7.6 | 4.3 | 3 | 6.6 | 5.8 | 1 | 2.9 | 12.6 | 7.5 | 1 | -4.5 | -1.1 | 7.5 | 8.4 | 13.4 | 7.7 | 4.2 | 4.5 | 4.3 | -4 | 5.5 | 3.1 | -0.1 | -0.3 | 2 | 7.8 | 8.7 |
| Apparent min temperature | 12.9 | 12.4 | 15.6 | 17.8 | 10 | 5.1 | 5.3 | 8.1 | 8.1 | 4.2 | 7.1 | 14.4 | 6.2 | -1.4 | -1.1 | 2.1 | 7.6 | 11.9 | 15.2 | 8.3 | 4.2 | 3.4 | 3.6 | -0.1 | 8.3 | 2.8 | -0.2 | 1.9 | 4.7 | 9.5 | 12.2 |
| 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) | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10.1 | 10.1 | 10.1 | 10.1 | 10.1 | 10.1 | 10.2 | 10.2 | 10.2 | 10.2 | 10.2 | 10.3 | 10.3 | 10.3 | 10.3 | 10.4 | 10.4 | 10.4 | 10.4 | 10.5 | 10.5 | 10.5 | 10.5 |
| Sunshine duration (h) | 4 | 7.8 | 1.3 | 2 | 9 | 9 | 9 | 4.2 | 9 | 9 | 7.6 | 4.2 | 8 | 9.2 | 9.2 | 9.1 | 1.9 | 0.2 | 4.4 | 9.4 | 0.8 | 0 | 9.4 | 9.5 | 0.8 | 9.5 | 9.5 | 9.3 | 1.2 | 1.4 | 0.1 |
| Precipitation (mm) | 1 | 0 | 0.2 | 50.7 | 0 | 0 | 0 | 0 | 2.2 | 0 | 0 | 5.1 | 6.8 | 0 | 0 | 0 | 3.5 | 0.1 | 0.5 | 0 | 0 | 23.6 | 4.7 | 0 | 16 | 0.1 | 0 | 0 | 0 | 19.1 | 0.4 |
| Precipitation hours | 4 | 0 | 1 | 20 | 0 | 0 | 0 | 0 | 4 | 0 | 0 | 11 | 2 | 0 | 0 | 0 | 9 | 1 | 4 | 0 | 0 | 16 | 5 | 0 | 11 | 1 | 0 | 0 | 0 | 14 | 2 |
| Wind speed (m/s) | 10.8 | 9.4 | 15.8 | 18.3 | 17.5 | 13 | 11.1 | 10.1 | 14.2 | 9.2 | 10.9 | 25.1 | 22.4 | 23.1 | 15.6 | 10.5 | 17.2 | 12.1 | 29.7 | 18 | 14.4 | 15.3 | 20.2 | 10.9 | 26.8 | 23.6 | 13.8 | 10.5 | 9.9 | 7.7 | 11.5 |
In January 2023, the highest daytime temperature in Washington was 21.2°C.
While the minimum temperature at night dropped to -4.5°C.
The average nighttime and daytime temperatures during January in Washington are 5.3°C and 15°C respectively.
The precipitation sum in January is about 134 mm.