Jewell Island Weather Forecast

    • 56
    • 62

    Rain Showers

    • 55
    • 66

    Mostly Sunny

    • 55
    • 65

    Partly Sunny

    • 56
    • 64

    Partly Sunny

    • 52
    • 68

    Mostly Sunny

    • 52
    • 63

    Mostly Sunny

Today 7 Sep Coastal Cumberland

Patchy fog this morning. Showers. Highs in the mid 60s. Light and variable Winds. Chance of rain 90 percent.

Tonight 7 Sep Coastal Cumberland

Mostly cloudy in the Evening, then becoming partly cloudy. Lows in the upper 40s. Light and variable Winds.

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Jewell Island Temperature Statistics

September Temperature

Portland, Portland International Jetport (10.6 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 (10.6 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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