Columbia River - Cooper Island Weather Forecast

    • 41
    • 58

    Mostly Sunny

    • 47
    • 69

    Mostly Sunny

    • 48
    • 74

    Partly Sunny

    • 47
    • 66

    Mostly Cloudy

    • 53
    • 74

    Mostly Sunny

    • 55
    • 84

    Mostly Sunny

    • 53
    • 78

    Mostly Sunny

Today 28 Apr Lower Columbia River

Partly sunny. Highs in the lower 60s. Winds light.

Tonight 28 Apr Lower Columbia River

Partly cloudy in the Evening, then becoming mostly clear. Lows around 40. Winds light.

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Columbia River - Cooper Island Temperature Statistics

April Temperature

Southwest Washington Regional Airport (16.8 miles)

  • Lowest 9 April, 2026

    35.1 °F

  • Average April

    52.7 °F

  • Highest 5 April, 2026

    79 °F

Climate (2021–Present)

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

    62.5 °F
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