Portland International Airport Weather Forecast

    • 62
    • 79

    Chance Thunderstorms

    • 60
    • 78

    Mostly Cloudy

    • 62
    • 73

    Rain Showers

    • 60
    • 70

    Rain Showers

    • 59
    • 75

    Chance Rain Showers

    • 60
    • 76

    Slight Chance Rain Showers

Today 6 Sep Inner Portland Metro

Mostly cloudy this Morning, then partly sunny with a chance of Showers with a slight chance of Thunderstorms this afternoon. Highs around 80. Winds light. Chance of rain 40 percent. Rainfall Amounts less than a tenth of an Inch, except higher Amounts possible in Thunderstorms.

Tonight 6 Sep Inner Portland Metro

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

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Portland International Airport Temperature Statistics

September Temperature

Portland, Portland International Airport (0.6 miles)

  • Lowest 2 September, 2025

    61 °F

  • Average September

    72.5 °F

  • Highest 2 September, 2025

    89.1 °F

Climate (2020–Present)

Portland, Portland International Airport (0.6 miles)

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  • Average Low 2020–2025

    48.3 °F

  • Average 2020–2025

    56.1 °F

  • Average High 2020–2025

    65.3 °F
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