Hat Rock State Park Weather Forecast

    • 42
    • 52

    Mostly Cloudy

    • 42
    • 66

    Chance Rain

    • 38
    • 59

    Partly Sunny

    • 39
    • 51

    Chance Rain

    • 45
    • 60

    Rain Likely

    • 45
    • 58

    Rain Likely

Today 31 Oct Lower Columbia Basin of Oregon

Mostly cloudy. Patchy fog in the morning. Highs in the lower 50s. Light wind.

Tonight 31 Oct Lower Columbia Basin of Oregon

Cloudy. A 20 percent chance of rain overnight. Lows in the lower 40s. Light Wind, becoming south 5 to 10 Mph overnight.

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Hat Rock State Park Temperature Statistics

October Temperature

Hermiston, Hermiston Municipal Airport (7.5 miles)

  • Lowest 14 October, 2025

    30 °F

  • Average October

    52.6 °F

  • Highest 8 October, 2025

    75.9 °F

Climate (2020–Present)

Hermiston, Hermiston Municipal Airport (7.5 miles)

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  • Average Low 2020–2025

    42.9 °F

  • Average 2020–2025

    55.2 °F

  • Average High 2020–2025

    67.5 °F
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