Portland Weather Forecast

    • 40
    • 45

    Rain

    • 27
    • 53

    Rain

    • 32
    • 38

    Chance Rain/Snow

    • 21
    • 43

    Slight Chance Rain

    • 18
    • 27

    Mostly Sunny

    • 27
    • 33

    Chance Rain/Snow

Today 18 Dec Coastal Cumberland

Partly sunny. Highs in the mid 40s. Light and variable Winds, becoming south around 10 Mph with Gusts up to 25 Mph in the afternoon.

Tonight 18 Dec Coastal Cumberland

Mostly clear. Lows in the lower 20s. Light and variable Winds.

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Portland Temperature Statistics

December Temperature

Portland, Portland International Jetport (2.5 miles)

  • Lowest 9 December, 2025

    -0.9 °F

  • Average December

    23.9 °F

  • Highest 1 December, 2025

    39 °F

Climate (2020–Present)

Portland, Portland International Jetport (2.5 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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