Lower Monumental State Airport Weather Forecast

    • 54
    • 84

    Sunny

    • 55
    • 89

    Sunny

    • 56
    • 88

    Mostly Sunny

    • 57
    • 87

    Partly Sunny

    • 57
    • 83

    Partly Sunny

    • 51
    • 79

    Mostly Sunny

Today 16 Sep Lower Columbia Basin of Washington

Sunny. Highs in the lower 80s. Northeast wind 5 to 10 Mph.

Tonight 16 Sep Lower Columbia Basin of Washington

Clear. Lows in the lower to mid 50s. Northeast wind 5 to 10 Mph in the Evening, becoming light.

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Lower Monumental State Airport Temperature Statistics

September Temperature

Walla Walla Regional Airport (33.6 miles)

  • Lowest 14 September, 2025

    57.9 °F

  • Average September

    77.1 °F

  • Highest 2 September, 2025

    97 °F

Climate (2020–Present)

Walla Walla Regional Airport (33.6 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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