Hat Rock State Park Weather Forecast

    • 46
    • 75

    Rain

    • 41
    • 54

    Rain

    • 41
    • 60

    Partly Sunny

    • 39
    • 64

    Mostly Sunny

    • 41
    • 65

    Mostly Sunny

    • 45
    • 68

    Partly Sunny

Today 21 Apr Lower Columbia Basin of Oregon

Mostly cloudy. A 40 percent chance of rain in the afternoon. Highs in the lower to mid 70s. Breezy. Southwest wind 10 to 20 Mph. Gusts up to 30 Mph in the afternoon. Rainfall Amounts less than a tenth of an inch.

Tonight 21 Apr Lower Columbia Basin of Oregon

Rain likely and a chance of Thunderstorms in the Evening, then rain likely overnight. Lows in the mid to upper 40s. Windy. Southwest wind 15 to 25 Mph with Gusts to around 35 Mph. Chance of precipitation 70 percent. Rainfall Amounts up to a half of an inch Possible, except higher Amounts possible in Thunderstorms.

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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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