Hat Rock State Park Weather Forecast

    • 51
    • 74

    Increasing Clouds

    • 52
    • 76

    Partly Sunny

    • 54
    • 79

    Mostly Sunny

    • 53
    • 80

    Mostly Sunny

    • 56
    • 80

    Mostly Sunny

    • 56
    • 83

    Mostly Sunny

Today 30 Sep Lower Columbia Basin of Oregon

Sunny. Highs in the lower to mid 70s. Northwest wind 5 to 10 Mph with Gusts to around 20 Mph.

Tonight 30 Sep Lower Columbia Basin of Oregon

Partly cloudy. Lows around 50. Northeast wind 5 to 10 Mph in the Evening, becoming light.

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Hat Rock State Park Temperature Statistics

September Temperature

Hermiston, Hermiston Municipal Airport (7.5 miles)

  • Lowest 28 September, 2026

    35.1 °F

  • Average September

    62.9 °F

  • Highest 10 September, 2026

    90.6 °F

Climate (2021–2026)

Hermiston, Hermiston Municipal Airport (7.5 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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