Hat Rock State Park Weather Forecast

    • 44
    • 68

    Mostly Cloudy

    • 45
    • 72

    Mostly Sunny

    • 48
    • 78

    Mostly Sunny

    • 53
    • 80

    Mostly Cloudy

    • 54
    • 80

    Mostly Cloudy

    • 56
    • 85

    Mostly Sunny

Today 28 Apr Lower Columbia Basin of Oregon

Sunny in the Morning, becoming mostly cloudy. Highs in the mid to upper 60s. Breezy. Southwest wind 10 to 20 Mph.

Tonight 28 Apr Lower Columbia Basin of Oregon

Mostly cloudy. Lows in the lower 40s. Southwest wind 5 to 15 Mph with Gusts to around 25 Mph.

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Hat Rock State Park Temperature Statistics

April Temperature

Hermiston, Hermiston Municipal Airport (7.5 miles)

  • Lowest 18 April, 2026

    30 °F

  • Average April

    52.1 °F

  • Highest 6 April, 2026

    78.7 °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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