Cow Island Weather Forecast

    • 45
    • 49

    Rain Showers Likely

    • 46
    • 52

    Chance Rain Showers

    • 47
    • 56

    Mostly Cloudy

    • 49
    • 59

    Mostly Sunny

    • 52
    • 65

    Partly Sunny

    • 53
    • 64

    Mostly Cloudy

    • 55
    • 63

    Mostly Cloudy

Today 23 May Coastal Cumberland

Rain. Highs in the upper 40s. Northwest Winds 10 to 15 Mph with Gusts up to 30 Mph. Chance of rain 80 percent.

Tonight 23 May Coastal Cumberland

Cloudy. Scattered Showers this Evening, then Showers likely after midnight. Lows in the lower 40s. Light and variable Winds. Chance of rain 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Cow Island Temperature Statistics

May Temperature

Portland, Portland International Jetport (6.2 miles)

  • Lowest 1 May, 2025

    36.6 °F

  • Average May

    53.5 °F

  • Highest 18 May, 2025

    70.6 °F

Climate (2020–Present)

Portland, Portland International Jetport (6.2 miles)

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  • Average Low 2020–2025

    40.7 °F

  • Average 2020–2025

    49.1 °F

  • Average High 2020–2025

    57.4 °F
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