Umatilla Weather Forecast

    • 50
    • 76

    Decreasing Clouds

    • 55
    • 80

    Rain Showers

    • 45
    • 72

    Rain Showers

    • 45
    • 67

    Partly Sunny

    • 45
    • 69

    Partly Sunny

    • 46
    • 70

    Partly Sunny

    • 47
    • 71

    Partly Sunny

Today 23 Sep Lower Columbia Basin of Oregon

Partly cloudy. Highs in the mid 70s. West wind 5 to 10 Mph.

Tonight 23 Sep Lower Columbia Basin of Oregon

Partly cloudy. Lows around 50. Southwest wind 5 to 10 Mph.

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Umatilla Temperature Statistics

September Temperature

Hermiston, Hermiston Municipal Airport (6.8 miles)

  • Lowest 4 September, 2026

    42.7 °F

  • Average September

    63.8 °F

  • Highest 10 September, 2026

    90.6 °F

Climate (2021–2026)

Hermiston, Hermiston Municipal Airport (6.8 miles)

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  • Average Low 2021–2026

    42.8 °F

  • Average 2021–2026

    55.1 °F

  • Average High 2021–2026

    67.5 °F
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