Seattle weather in January 2026

Expect 7°C daytime maximum temperatures in the shade with on average 2 hours of sunshine per day in Seattle in January based on long-term weather averages. There is usually 18 days with some rainfall and 149 mm of average monthly rainfall in January.

  • 7°C maximum daytime temperature in January in Seattle7
    7°C max day temperature
  • 2 hours of sunshine per day
  • 18 days with some rainfall in January in Seattle18
    18 days with some rainfall
  • 2°C minimum night-time temperature in January in Seattle2
    2°C 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
  • 149 mm monthly rainfall in January in Seattle149
    149 mm 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 / mm)  |  Imperial (°F / inches)

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More about the USA

How cold is it in Seattle in January?

Daytime temperatures usually reach 7°C in Seattle in January, falling to 2°C 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 149mm.

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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