Last updated: March 2, 2024
The weather in Washington, United States, during January is characterized by an average temperature of 1°C (34°F). Highs can soar to 17°C (63°F), while lows may dip to -14°C (7°F). Typically, the humidity level in Washington throughout January hovers around 88%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In January, Washington averages 91 mm (3.6 inches) of rainfall, typically over the course of 10 rainy days. The month enjoys an average of 9 hours 45 minutes of daylight, with the sun shining for approximately 3 hours 41 minutes each day. Additionally, there is a 30% probability of sunny days during this period.
Precipitation
Rainy days
Sunshine hours
Chance of sun
In January, the UV Index in Washington reaches a maximum of 3, indicating a level of Moderate exposure. The most intense UV radiation typically occurs between 11:00 and 13:00, during which unprotected skin may burn in as little as 30 minutes.
| 07:00 | 08:00 | 09:00 | 10:00 | 11:00 | 12:00 | 13:00 | 14:00 | 15:00 | 16:00 | 17:00 | 18:00 | 19:00 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UVI | 0 | 1 | 1 | 2 | 3 | 3 | 3 | 3 | 2 | 1 | 1 | 0 | 0 |
| Exposure | Low | Moderate | Low | ||||||||||
| Time to burn | 45 min | 30 min | 45 min | ||||||||||