Hat Rock State Park Weather Forecast

    • 43
    • 70

    Becoming Sunny

    • 43
    • 69

    Mostly Sunny

    • 48
    • 71

    Partly Sunny

    • 40
    • 71

    Partly Sunny

    • 43
    • 64

    Partly Sunny

    • 40
    • 62

    Mostly Cloudy

    • 40
    • 62

    Partly Sunny

Today 14 Oct Lower Columbia Basin of Oregon

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

Tonight 14 Oct Lower Columbia Basin of Oregon

Mostly clear. Lows in the lower to mid 40s. Light wind.

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Hat Rock State Park Temperature Statistics

October Temperature

Hermiston, Hermiston Municipal Airport (7.5 miles)

  • Lowest 11 October, 2026

    33.1 °F

  • Average October

    58.7 °F

  • Highest 5 October, 2026

    84.7 °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

    67.6 °F
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