Hat Rock State Park Weather Forecast

    • 50
    • 75

    Increasing Clouds

    • 50
    • 77

    Mostly Sunny

    • 52
    • 80

    Mostly Sunny

    • 54
    • 84

    Mostly Sunny

    • 54
    • 83

    Mostly Sunny

    • 52
    • 81

    Partly Sunny

Today 19 May Lower Columbia Basin of Oregon

Partly cloudy in the morning then clearing. Highs in the lower to mid 70s. Southwest wind 5 to 15 Mph with Gusts to around 25 Mph.

Tonight 19 May Lower Columbia Basin of Oregon

Partly cloudy. Lows in the upper 40s. Breezy. West wind 10 to 20 Mph with Gusts to around 30 Mph.

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  • Temperature Real-Time

Hat Rock State Park Temperature Statistics

May Temperature

Hermiston, Hermiston Municipal Airport (7.5 miles)

  • Lowest 1 May, 2026

    37.7 °F

  • Average May

    62.6 °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

    55.3 °F

  • Average High 2021–2026

    67.7 °F
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