South Portland Weather Forecast

    • 57
    • 77

    Rain Showers

    • 52
    • 69

    Rain Showers Likely

    • 52
    • 75

    Mostly Sunny

    • 52
    • 72

    Partly Sunny

    • 53
    • 72

    Partly Sunny

    • 49
    • 77

    Mostly Sunny

    • 49
    • 71

    Mostly Sunny

Today 6 Sep Coastal Cumberland

Partly sunny with a chance of Showers and Thunderstorms. Some Thunderstorms may be severe with damaging Winds and large hail. Highs in the upper 70s. South Winds 10 to 15 Mph with Gusts up to 30 Mph. Chance of rain 50 percent.

Tonight 6 Sep Coastal Cumberland

Cloudy. Rain and scattered Thunderstorms this Evening, then a chance of Showers after midnight. Patchy fog after midnight. Some Thunderstorms may produce heavy rainfall this evening. Lows in the mid 50s. Northwest Winds around 10 Mph with Gusts up to 25 Mph this Evening, becoming light and variable. Chance of rain 90 percent.

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South Portland Temperature Statistics

September Temperature

Portland, Portland International Jetport (3.1 miles)

  • Lowest 3 September, 2025

    52 °F

  • Average September

    64.6 °F

  • Highest 2 September, 2025

    78.1 °F

Climate (2020–Present)

Portland, Portland International Jetport (3.1 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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