Lower Monumental State Airport Weather Forecast

    • 39
    • 65

    Becoming Sunny

    • 42
    • 70

    Mostly Sunny

    • 49
    • 73

    Chance Rain

    • 44
    • 67

    Rain Likely

    • 41
    • 58

    Rain Likely

    • 39
    • 58

    Slight Chance Rain

    • 42
    • 59

    Slight Chance Rain

Today 8 Apr Lower Columbia Basin of Washington

Partly cloudy. Highs in the mid to upper 60s. Southwest wind 5 to 10 Mph.

Tonight 8 Apr Lower Columbia Basin of Washington

Mostly clear. Lows in the upper 30s to lower 40s. South wind 5 to 10 Mph shifting to the north overnight.

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Lower Monumental State Airport Temperature Statistics

April Temperature

Walla Walla Regional Airport (33.6 miles)

  • Lowest 4 April, 2026

    39 °F
  • Average April

    54.1 °F
  • Highest 6 April, 2026

    73.9 °F

Climate (2021–Present)

Walla Walla Regional Airport (33.6 miles)

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  • Average Low 2021–2026

    45.5 °F
  • Average 2021–2026

    54.9 °F
  • Average High 2021–2026

    64.5 °F
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