Lower Monumental State Airport Weather Forecast

    • 60
    • 87

    Increasing Clouds

    • 53
    • 72

    Rain Showers Likely

    • 50
    • 75

    Mostly Sunny

    • 54
    • 83

    Sunny

    • 50
    • 86

    Mostly Sunny

    • 49
    • 76

    Mostly Sunny

Today 13 Sep Lower Columbia Basin of Washington

Partly cloudy in the Morning, becoming sunny. Highs in the mid to upper 80s. South wind 5 to 10 Mph.

Tonight 13 Sep Lower Columbia Basin of Washington

Partly cloudy. A 20 percent chance of Showers overnight. Lows in the upper 50s to lower 60s. Southwest wind 5 to 10 Mph.

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Lower Monumental State Airport Temperature Statistics

September Temperature

Walla Walla Regional Airport (33.6 miles)

  • Lowest 10 September, 2025

    62.1 °F

  • Average September

    79 °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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