McCormack Slough Weather Forecast

    • 32
    • 44

    Partly Sunny

    • 30
    • 41

    Partly Sunny

    • 29
    • 40

    Partly Sunny

    • 28
    • 40

    Partly Sunny

    • 28
    • 39

    Mostly Cloudy

    • 29
    • 40

    Mostly Cloudy

Today 15 Jan Lower Columbia Basin of Oregon

Partly sunny. Patchy fog in the morning. Highs in the lower 40s. Light wind.

Tonight 15 Jan Lower Columbia Basin of Oregon

Mostly cloudy. Patchy fog and freezing fog overnight. Lows in the upper 20s to lower 30s. Light wind.

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McCormack Slough Temperature Statistics

January Temperature

Hermiston, Hermiston Municipal Airport (16.2 miles)

  • Lowest 10 January, 2026

    26.1 °F

  • Average January

    38.3 °F

  • Highest 12 January, 2026

    57 °F

Climate (2021–Present)

Hermiston, Hermiston Municipal Airport (16.2 miles)

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  • Average Low 2021–2026

    43 °F

  • Average 2021–2026

    55.3 °F

  • Average High 2021–2026

    67.7 °F
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