Lower Monumental State Airport Weather Forecast

    • 34
    • 42

    Rain

    • 33
    • 48

    Mostly Cloudy

    • 36
    • 44

    Rain

    • 30
    • 45

    Chance Rain

    • 30
    • 41

    Rain Likely

    • 29
    • 42

    Slight Chance Rain

    • 30
    • 41

    Mostly Cloudy

Today 21 Dec Lower Columbia Basin of Washington

Cloudy with a 50 percent chance of rain. Highs in the lower 40s. Southeast wind 5 to 10 Mph in the Morning, becoming light. Rainfall Amounts less than a tenth of an inch.

Tonight 21 Dec Lower Columbia Basin of Washington

Mostly cloudy with a 50 percent chance of rain. Lows in the lower to mid 30s. South wind 5 to 10 Mph. Gusts up to 20 Mph overnight. Rainfall Amounts less than a tenth of an inch.

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Lower Monumental State Airport Temperature Statistics

December Temperature

Walla Walla Regional Airport (33.6 miles)

  • Lowest 1 December, 2025

    27 °F

  • Average December

    48.6 °F

  • Highest 15 December, 2025

    68 °F

Climate (2020–Present)

Walla Walla Regional Airport (33.6 miles)

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  • Average Low 2020–2025

    45.4 °F

  • Average 2020–2025

    54.8 °F

  • Average High 2020–2025

    64.4 °F
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