McCormack Slough Weather Forecast

    • 37
    • 56

    Increasing Clouds

    • 37
    • 52

    Mostly Cloudy

    • 33
    • 52

    Partly Sunny

    • 40
    • 51

    Mostly Cloudy

    • 35
    • 53

    Partly Sunny

    • 35
    • 52

    Mostly Cloudy

Today 28 Oct Lower Columbia Basin of Oregon

Partly sunny with a 20 percent chance of rain Showers. Highs in the mid to upper 50s. Windy. Southwest wind 15 to 25 Mph with Gusts to around 35 Mph.

Tonight 28 Oct Lower Columbia Basin of Oregon

Partly cloudy. Lows in the lower to mid 30s. Southwest wind 5 to 15 Mph. Gusts up to 25 Mph in the evening.

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McCormack Slough Temperature Statistics

October Temperature

Hermiston, Hermiston Municipal Airport (16.2 miles)

  • Lowest 13 October, 2026

    27.6 °F

  • Average October

    53.5 °F

  • Highest 5 October, 2026

    84.7 °F

Climate (2021–2026)

Hermiston, Hermiston Municipal Airport (16.2 miles)

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  • Average Low 2021–2026

    42.7 °F

  • Average 2021–2026

    55.1 °F

  • Average High 2021–2026

    67.6 °F
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