Seattle weather in January 2026

Expect daytime maximum temperatures of 45°F in Seattle, Washington State in January based on long-term weather averages. There are 2 hours of sunshine per day on average with 18 days with some rainfall and typically 5.9 inches of rainfall in the month.

  • 45°F maximum daytime temperature in January in Seattle45
    45°F max day temperature
  • 2 hours of sunshine per day
  • 18 days with some rainfall in January in Seattle18
    18 days with some rainfall
  • 36°F minimum night-time temperature in January in Seattle36
    36°F min night temperature
  • 9 hours of daylight per day in January in Seattle9
    9 hours of daylight per day
  • No heat & humidity in January in Seattle0
    No heat & humidity
  • 5.9 inches monthly rainfall in January in Seattle5.9
    5.9 inches of monthly rainfall
  • UV (maximum) index 1 (Low) in January in Seattle1
    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.

Metric (°C)  |  Imperial (°F)

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More about the USA

How cold is it in Seattle in January?

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

How sunny is it in Seattle in January?

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

Does it rain in Seattle in January?

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

Seattle January sunrise & sunset times

Browse the sunrise and sunset times for Seattle in January 2026. Select a month to view Seattle sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st January 2026 07:58 16:29
Friday, 16th January 2026 07:52 16:47
Saturday, 31st January 2026 07:37 17:09

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