Walla Walla weather in December 2025

Expect daytime maximum temperatures of 5°C in Walla Walla in December based on long-term weather averages. There are 2 hours of sunshine per day on average with 12 days with some rainfall and typically 66 mm of rainfall in the month.

  • 5°C maximum daytime temperature in December in Walla Walla5
    5°C max day temperature
  • 2 hours of sunshine per day
  • 12 days with some rainfall in December in Walla Walla12
    12 days with some rainfall
  • -2°C minimum night-time temperature in December in Walla Walla-2
    -2°C min night temperature
  • 9 hours of daylight per day in December in Walla Walla9
    9 hours of daylight per day
  • No heat & humidity in December in Walla Walla0
    No heat & humidity
  • 66 mm monthly rainfall in December in Walla Walla66
    66 mm of monthly rainfall
  • UV (maximum) index 1 (Low) in December in Walla Walla1
    1 (Low) UV index

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The December weather guide for Washington State (Walla Walla) 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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How cold is it in Walla Walla in December?

Daytime temperatures usually reach 5°C in Walla Walla in December, falling to -2°C at night.

How sunny is it in Walla Walla in December?

There are normally 2 hours of bright sunshine each day in Walla Walla in December - that's 17% of daylight hours.

Does it rain in Walla Walla in December?

There are usually 12 days with some rain in Walla Walla in December and the average monthly rainfall is 66mm. Rain may fall as snow in this month.

Walla Walla December sunrise & sunset times

Browse the sunrise and sunset times for Walla Walla in December 2025. Select a month to view Walla Walla sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st December 2025 07:15 16:09
Tuesday, 16th December 2025 07:30 16:09
Wednesday, 31st December 2025 07:35 16:18

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