Columbia River - Government Island Weather Forecast

    • 52
    • 82

    Rain

    • 50
    • 64

    Rain

    • 48
    • 67

    Mostly Cloudy

    • 45
    • 63

    Chance Rain

    • 44
    • 61

    Chance Rain Showers

    • 46
    • 66

    Partly Sunny

Today 12 May Inner Portland Metro

Mostly sunny. Highs in the lower 80s. Southwest wind 5 to 10 Mph.

Tonight 12 May Inner Portland Metro

Mostly cloudy with a slight chance of Thunderstorms. A chance of Showers in the Evening, then rain after midnight. Lows in the lower 50s. Southwest wind 5 to 10 Mph. Chance of rain 90 percent. Rainfall Amounts less than a tenth of an Inch, except higher Amounts possible in Thunderstorms.

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Columbia River - Government Island Temperature Statistics

May Temperature

Portland, Portland International Airport (5 miles)

  • Lowest 9 May, 2026

    48.7 °F

  • Average May

    63.8 °F

  • Highest 3 May, 2026

    91.7 °F

Climate (2021–Present)

Portland, Portland International Airport (5 miles)

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  • Average Low 2021–2026

    48.4 °F

  • Average 2021–2026

    56.4 °F

  • Average High 2021–2026

    65.5 °F
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