Portland Weather Forecast

    • 58
    • 80

    Increasing Clouds

    • 51
    • 69

    Rain

    • 54
    • 74

    Mostly Sunny

    • 57
    • 83

    Mostly Sunny

    • 54
    • 80

    Partly Sunny

    • 53
    • 72

    Partly Sunny

Today 20 Sep Inner Portland Metro

Sunny. Highs in the lower 80s. Winds light.

Tonight 20 Sep Inner Portland Metro

Partly cloudy in the Evening, then mostly cloudy with a chance of rain after midnight. Lows in the upper 50s. Southwest wind 5 to 10 Mph, becoming south after midnight. Chance of rain 50 percent. Rainfall Amounts less than a tenth of an inch.

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Portland Temperature Statistics

September Temperature

Portland, Portland International Airport (5.6 miles)

  • Lowest 15 September, 2025

    48.9 °F

  • Average September

    68.3 °F

  • Highest 2 September, 2025

    89.1 °F

Climate (2020–Present)

Portland, Portland International Airport (5.6 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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