Columbia River - Cooper Island Weather Forecast

    • 40
    • 54

    Rain Showers

    • 40
    • 54

    Rain Showers Likely

    • 38
    • 53

    Chance Rain Showers

    • 39
    • 55

    Chance Rain

    • 39
    • 57

    Mostly Cloudy

    • 42
    • 60

    Mostly Cloudy

Today 28 Oct Lower Columbia River

Showers likely with a slight chance of Thunderstorms. Highs in the mid 50s. Southwest wind 5 to 10 Mph. Chance of rain 70 percent. Rainfall Amounts a tenth to a quarter of an Inch, except higher Amounts possible in Thunderstorms.

Tonight 28 Oct Lower Columbia River

Mostly cloudy with a 50 percent chance of rain Showers. Patchy fog. Lows in the upper 30s. Winds light. Rainfall Amounts less than a tenth of an inch.

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Columbia River - Cooper Island Temperature Statistics

October Temperature

Southwest Washington Regional Airport (16.8 miles)

  • Lowest 11 October, 2026

    36 °F

  • Average October

    55 °F

  • Highest 4 October, 2026

    79 °F

Climate (2021–2026)

Southwest Washington Regional Airport (16.8 miles)

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  • Average Low 2021–2026

    45.2 °F

  • Average 2021–2026

    53.1 °F

  • Average High 2021–2026

    62.6 °F
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