Hat Rock State Park Weather Forecast

    • 52
    • 76

    Decreasing Clouds

    • 55
    • 78

    Mostly Cloudy

    • 48
    • 70

    Rain Showers Likely

    • 46
    • 66

    Partly Sunny

    • 46
    • 66

    Partly Sunny

    • 48
    • 69

    Partly Sunny

Today 23 Sep Lower Columbia Basin of Oregon

Partly cloudy. Highs in the mid 70s. Southwest 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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Hat Rock State Park Temperature Statistics

September Temperature

Hermiston, Hermiston Municipal Airport (7.5 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 (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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