January Weather in Washington

Last updated: March 2, 2024

The weather in Washington, United States, during January is characterized by an average temperature of -1°C (30°F). Highs can soar to 15°C (60°F), while lows may dip to -18°C (0°F). Typically, the humidity level in Washington throughout January hovers around 76%.

-18°C (0°F)

Minimum temperature

-1°C (30°F)

Average temperature

15°C (60°F)

Maximum temperature

76%

Humidity

Precipitation and Sunshine hours

In January, Washington averages 28 mm (1.1 inches) of rainfall, typically over the course of 5 rainy days. The month enjoys an average of 9 hours 42 minutes of daylight, with the sun shining for approximately 5 hours 19 minutes each day. Additionally, there is a 37% probability of sunny days during this period.

28 mm (1.1 inches)

Precipitation

5 rainy days

Rainy days

5 hours 19 minutes

Sunshine hours

37%

Chance of sun

UV Index

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.

Average solar exposure data for the current time of the year. Actual values may vary and depend on many factors, such as cloud cover, vegetation cover, surface type, etc.
  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

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