Walla Walla weather in August 2025

Expect daytime maximum temperatures of 88°F in Walla Walla, Washington State in August based on long-term weather averages. There are 11 hours of sunshine per day on average.

  • 88°F maximum daytime temperature in August in Walla Walla88
    88°F max day temperature
  • 11 hours of sunshine per day
  • 4 days with some rainfall in August in Walla Walla4
    4 days with some rainfall
  • 59°F minimum night-time temperature in August in Walla Walla59
    59°F min night temperature
  • 14 hours of daylight per day in August in Walla Walla14
    14 hours of daylight per day
  • Moderate heat & humidity in August in Walla WallaM
    Moderate heat & humidity
  • 0.8 inches monthly rainfall in August in Walla Walla0.8
    0.8 inches of monthly rainfall
  • UV (maximum) index 7 (High) in August in Walla Walla7
    7 (High) UV index

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The August 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)  |  Imperial (°F)

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How hot is it in Walla Walla in August?

Daytime temperatures usually reach 88°F in Walla Walla in August with moderate heat and humidity, falling to 59°F at night.

How sunny is it in Walla Walla in August?

There are normally 11 hours of bright sunshine each day in Walla Walla in August - that's 79% of daylight hours.

Does it rain in Walla Walla in August?

There are usually 4 days with some rain in Walla Walla in August and the average monthly rainfall is 0.8 inches.

Walla Walla August sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 04:36 19:22
Saturday, 16th August 2025 04:54 19:00
Sunday, 31st August 2025 05:13 18:33

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