Hat Rock State Park Weather Forecast

    • 54
    • 89

    Increasing Clouds

    • 48
    • 68

    Rain Showers Likely

    • 48
    • 71

    Mostly Sunny

    • 44
    • 70

    Breezy

    • 42
    • 65

    Partly Sunny

    • 45
    • 69

    Mostly Sunny

Today 12 May Lower Columbia Basin of Oregon

Partly cloudy. Highs in the mid to upper 80s. Light Wind, becoming northeast 5 to 10 Mph in the afternoon.

Tonight 12 May Lower Columbia Basin of Oregon

Partly cloudy. Lows in the lower to mid 50s. Windy. North wind 5 to 10 Mph with Gusts to around 25 Mph increasing to southwest 20 to 30 Mph with Gusts to around 45 Mph overnight.

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Hat Rock State Park Temperature Statistics

May Temperature

Hermiston, Hermiston Municipal Airport (7.5 miles)

  • Lowest 1 May, 2026

    37.7 °F

  • Average May

    66.2 °F

  • Highest 4 May, 2026

    88.6 °F

Climate (2021–Present)

Hermiston, Hermiston Municipal Airport (7.5 miles)

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  • Average Low 2021–2026

    43.1 °F

  • Average 2021–2026

    55.4 °F

  • Average High 2021–2026

    67.7 °F
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