Whitman Mission National Historic Site Weather Forecast

    • 53
    • 86

    Mostly Sunny

    • 55
    • 87

    Mostly Sunny

    • 58
    • 87

    Mostly Sunny

    • 48
    • 79

    Slight Chance Rain Showers

    • 50
    • 80

    Sunny

    • 53
    • 86

    Partly Sunny

Today 18 Sep Foothills of the Blue Mountains of Washington

Sunny. Highs in the mid 80s. South wind 5 to 10 Mph in the Morning, becoming light.

Tonight 18 Sep Foothills of the Blue Mountains of Washington

Mostly clear. Lows in the mid to upper 50s. Light Wind, becoming south 5 to 10 Mph overnight.

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Whitman Mission National Historic Site Temperature Statistics

September Temperature

Walla Walla Regional Airport (9.3 miles)

  • Lowest 16 September, 2025

    53.1 °F

  • Average September

    75.5 °F

  • Highest 2 September, 2025

    97 °F

Climate (2020–Present)

Walla Walla Regional Airport (9.3 miles)

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  • Average Low 2020–2025

    45.1 °F

  • Average 2020–2025

    54.6 °F

  • Average High 2020–2025

    64.1 °F
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