Lower Monumental State Airport Weather Forecast

    • 55
    • 85

    Mostly Sunny

    • 55
    • 87

    Partly Sunny

    • 50
    • 79

    Partly Sunny

    • 50
    • 74

    Partly Sunny

    • 50
    • 74

    Chance Rain Showers

    • 44
    • 67

    Chance Rain Showers

Today 20 Sep Lower Columbia Basin of Washington

Sunny. Highs in the lower to mid 80s. Light wind.

Tonight 20 Sep Lower Columbia Basin of Washington

Clear. Lows in the 50s. Light wind.

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  • Temperature Real-Time

Lower Monumental State Airport Temperature Statistics

September Temperature

Walla Walla Regional Airport (33.6 miles)

  • Lowest 15 September, 2026

    48.7 °F

  • Average September

    64.1 °F

  • Highest 9 September, 2026

    86.6 °F

Climate (2021–2026)

Walla Walla Regional Airport (33.6 miles)

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  • Average Low 2021–2026

    45.3 °F

  • Average 2021–2026

    54.9 °F

  • Average High 2021–2026

    64.5 °F
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