Irrigon Weather Forecast

    • 45
    • 68

    Increasing Clouds

    • 42
    • 69

    Becoming Sunny

    • 48
    • 73

    Mostly Sunny

    • 52
    • 76

    Partly Sunny

    • 50
    • 75

    Mostly Sunny

    • 49
    • 74

    Partly Sunny

    • 47
    • 73

    Mostly Sunny

Today 26 Sep Lower Columbia Basin of Oregon

Sunny. Highs in the mid to upper 60s. Northwest wind 5 to 10 Mph.

Tonight 26 Sep Lower Columbia Basin of Oregon

Mostly cloudy. Lows in the lower to mid 40s. Northeast wind 5 to 10 Mph in the Evening, becoming light.

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Irrigon Temperature Statistics

September Temperature

Hermiston, Hermiston Municipal Airport (11.8 miles)

  • Lowest 4 September, 2026

    42.7 °F

  • Average September

    64 °F

  • Highest 10 September, 2026

    90.6 °F

Climate (2021–2026)

Hermiston, Hermiston Municipal Airport (11.8 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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