McCormack Slough Weather Forecast

    • 30
    • 40

    Partly Sunny

    • 31
    • 37

    Mostly Cloudy

    • 28
    • 39

    Partly Sunny

    • 31
    • 36

    Mostly Cloudy

    • 35
    • 39

    Mostly Cloudy

    • 43
    • 50

    Mostly Cloudy

Today 30 Nov Lower Columbia Basin of Oregon

Mostly sunny. Patchy dense fog and dense freezing fog in the morning. Highs in the upper 30s. Light wind.

Tonight 30 Nov Lower Columbia Basin of Oregon

Partly cloudy. Areas of freezing fog overnight. Lows in the mid to upper 20s. Light wind.

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McCormack Slough Temperature Statistics

November Temperature

Hermiston, Hermiston Municipal Airport (16.2 miles)

  • Lowest 19 November, 2025

    27 °F

  • Average November

    44.1 °F

  • Highest 15 November, 2025

    64.9 °F

Climate (2020–Present)

Hermiston, Hermiston Municipal Airport (16.2 miles)

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  • Average Low 2020–2025

    43 °F

  • Average 2020–2025

    55.3 °F

  • Average High 2020–2025

    67.6 °F
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