Washington State weather in January 2025

Expect 45°F daytime maximum temperatures in the shade with on average 2 hours of sunshine per day in Washington State in January. Check more long-term weather averages for Washington State in January before you book your next holiday to Washington State in 2025/2026.

  • 45°F maximum daytime temperature in January in Washington State (Seattle)45
    45°F max day temperature
  • 2 hours of sunshine per day
  • 18 days with some rainfall in January in Washington State (Seattle)18
    18 days with some rainfall
  • 36°F minimum night-time temperature in January in Washington State (Seattle)36
    36°F min night temperature
  • 9 hours of daylight per day in January in Washington State (Seattle)9
    9 hours of daylight per day
  • No heat & humidity in January in Washington State (Seattle)0
    No heat & humidity
  • 5.9 inches monthly rainfall in January in Washington State (Seattle)5.9
    5.9 inches of monthly rainfall
  • UV (maximum) index 1 (Low) in January in Washington State (Seattle)1
    1 (Low) UV index

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The January weather guide for Washington State (Seattle) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Top Washington State destinations

Below are average maximum temperatures at popular countries, regions and places in Washington State in January. Select a holiday destination to see more weather parameters.

All Washington State destinations

Metric (°C)  |  Imperial (°F)

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More about the USA

How cold is it in Washington State in January?

Daytime temperatures usually reach 45°F in Seattle, Washington State in January, falling to 36°F at night.

How sunny is it in Washington State in January?

There are normally 2 hours of bright sunshine each day in Seattle, Washington State in January - that's 25% of daylight hours.

Does it rain in Washington State in January?

There are usually 18 days with some rain in Seattle, Washington State in January and the average monthly rainfall is 5.9 inches.

Washington State January sunrise & sunset times

Browse the sunrise and sunset times for Washington State in January 2025. Select a month to view Washington State sunrise and sunset times for the next 12 months. The Washington State sunrise and sunset times shown below are for Seattle.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Wednesday, 1st January 2025 07:58 16:29
Thursday, 16th January 2025 07:52 16:47
Friday, 31st January 2025 07:37 17:10

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