Portland International Jetport Weather Forecast

    • 53
    • 72

    Rain Showers

    • 56
    • 75

    Partly Sunny

    • 43
    • 74

    Mostly Sunny

    • 41
    • 65

    Sunny

    • 49
    • 69

    Mostly Sunny

    • 53
    • 72

    Partly Sunny

Today 17 Sep Coastal Cumberland

Mostly cloudy this Morning, then becoming partly sunny. Highs in the lower 70s. Light and variable Winds, becoming south around 10 Mph this afternoon.

Tonight 17 Sep Coastal Cumberland

Patchy fog in the evening. Partly cloudy in the Evening, then mostly cloudy with scattered Showers after midnight. Lows in the lower 50s. Light and variable Winds. Chance of rain 30 percent.

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Portland International Jetport Temperature Statistics

September Temperature

Portland, Portland International Jetport (0 miles)

  • Lowest 9 September, 2025

    46 °F

  • Average September

    62.4 °F

  • Highest 11 September, 2025

    80.1 °F

Climate (2020–Present)

Portland, Portland International Jetport (0 miles)

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  • Average Low 2020–2025

    40.5 °F

  • Average 2020–2025

    49 °F

  • Average High 2020–2025

    57.4 °F
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