Lake Wallula Weather Forecast

    • 50
    • 77

    Sunny

    • 53
    • 83

    Sunny

    • 54
    • 87

    Mostly Sunny

    • 57
    • 88

    Partly Sunny

    • 58
    • 88

    Mostly Sunny

    • 58
    • 85

    Mostly Sunny

    • 53
    • 80

    Partly Sunny

Today 15 Sep Lower Columbia Basin of Oregon

Sunny. Highs in the lower to mid 70s. West wind 5 to 15 Mph.

Tonight 15 Sep Lower Columbia Basin of Oregon

Mostly clear. Lows in the lower 50s. Light Wind, becoming east 5 to 10 Mph overnight.

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Lake Wallula Temperature Statistics

September Temperature

Hermiston, Hermiston Municipal Airport (7.5 miles)

  • Lowest 13 September, 2025

    54 °F

  • Average September

    74 °F

  • Highest 2 September, 2025

    98.1 °F

Climate (2020–Present)

Hermiston, Hermiston Municipal Airport (7.5 miles)

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  • Average Low 2020–2025

    42.9 °F

  • Average 2020–2025

    55.2 °F

  • Average High 2020–2025

    67.6 °F
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