Hermiston Municipal Airport Weather Forecast

    • 52
    • 79

    Increasing Clouds

    • 42
    • 72

    Rain Showers

    • 40
    • 67

    Partly Sunny

    • 40
    • 68

    Partly Sunny

    • 44
    • 70

    Partly Sunny

    • 46
    • 72

    Partly Sunny

    • 45
    • 73

    Partly Sunny

Today 24 Sep Lower Columbia Basin of Oregon

Mostly cloudy. Highs in the mid to upper 70s. Light wind.

Tonight 24 Sep Lower Columbia Basin of Oregon

Mostly cloudy. Lows in the mid to upper 50s. Light Wind, becoming southwest 5 to 10 Mph with Gusts to around 20 Mph overnight.

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Hermiston Municipal Airport Temperature Statistics

September Temperature

Hermiston, Hermiston Municipal Airport (0 miles)

  • Lowest 4 September, 2026

    42.7 °F

  • Average September

    64.1 °F

  • Highest 10 September, 2026

    90.6 °F

Climate (2021–2026)

Hermiston, Hermiston Municipal Airport (0 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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