Columbia River - McGuire Island Weather Forecast

    • 53
    • 73

    Becoming Sunny

    • 57
    • 83

    Mostly Cloudy

    • 57
    • 72

    Rain Likely

    • 54
    • 66

    Rain

    • 53
    • 65

    Rain Likely

    • 53
    • 69

    Chance Rain

Today 30 Aug East Portland Metro

Mostly cloudy this Morning, then clearing. Highs in the mid 70s. Winds light.

Tonight 30 Aug East Portland Metro

Mostly clear. Lows in the lower 50s. Winds light.

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Columbia River - McGuire Island Temperature Statistics

August Temperature

Portland, Portland-Troutdale Airport (2.5 miles)

  • Lowest 3 August, 2026

    50.6 °F

  • Average August

    71.5 °F

  • Highest 6 August, 2026

    96.7 °F

Climate (2021–2026)

Portland, Portland-Troutdale Airport (2.5 miles)

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  • Average Low 2021–2026

    47.5 °F

  • Average 2021–2026

    56.2 °F

  • Average High 2021–2026

    65.2 °F
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