South Portland Weather Forecast

    • 20
    • 31

    Breezy

    • 26
    • 36

    Chance Snow

    • 14
    • 32

    Chance Snow

    • 15
    • 26

    Snow Showers

    • 21
    • 32

    Partly Sunny

    • 28
    • 40

    Mostly Cloudy

Today 12 Dec Coastal Cumberland

Partly sunny. Highs around 30. West Winds 15 to 20 Mph with Gusts up to 35 Mph. Wind chill Values as low as 1 below this morning.

Tonight 12 Dec Coastal Cumberland

Mostly clear. Lows around 16. West Winds 10 to 15 Mph. Gusts up to 30 Mph in the evening.

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South Portland Temperature Statistics

December Temperature

Portland, Portland International Jetport (3.1 miles)

  • Lowest 9 December, 2025

    -0.9 °F

  • Average December

    23.1 °F

  • Highest 1 December, 2025

    39 °F

Climate (2020–Present)

Portland, Portland International Jetport (3.1 miles)

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  • Average Low 2020–2025

    40.4 °F

  • Average 2020–2025

    48.9 °F

  • Average High 2020–2025

    57.3 °F
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