Dayton Weather Forecast

    • 58
    • 89

    Mostly Sunny

    • 56
    • 87

    Sunny

    • 57
    • 89

    Sunny

    • 62
    • 96

    Mostly Sunny

    • 65
    • 99

    Hot

    • 64
    • 98

    Hot

Today 19 Aug Foothills of the Blue Mountains of Washington

Sunny. Highs in the mid 80s to lower 90s. Southwest wind 5 to 10 Mph.

Tonight 19 Aug Foothills of the Blue Mountains of Washington

Mostly clear. Lows in the upper 50s to lower 60s. Southwest wind 5 to 10 Mph.

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Dayton Temperature Statistics

August Temperature

Walla Walla Regional Airport (21.7 miles)

  • Lowest 5 August, 2025

    56.6 °F

  • Average August

    76.7 °F

  • Highest 12 August, 2025

    101.6 °F

Climate (2020–Present)

Walla Walla Regional Airport (21.7 miles)

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  • Average Low 2020–2025

    45 °F

  • Average 2020–2025

    54.5 °F

  • Average High 2020–2025

    64 °F
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