Yarmouth Weather Forecast

    • 62
    • 85

    Thunderstorms

    • 57
    • 80

    Mostly Sunny

    • 61
    • 80

    Mostly Sunny

    • 55
    • 87

    Slight Chance Rain Showers

    • 52
    • 75

    Partly Sunny

    • 54
    • 74

    Slight Chance Rain Showers

    • 54
    • 73

    Slight Chance Thunderstorms

Today 14 Aug Coastal Cumberland

Numerous Showers and scattered Thunderstorms. Warm with Highs in the mid 80s. South Winds around 10 Mph with Gusts up to 20 Mph. Chance of rain 60 percent. Heat index Values in the lower 90s.

Tonight 14 Aug Coastal Cumberland

Partly cloudy with scattered Showers with isolated Thunderstorms in the Evening, then mostly clear after midnight. Lows in the lower 60s. Light and variable Winds, becoming north around 10 Mph after midnight. Chance of rain 40 percent.

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Yarmouth Temperature Statistics

August Temperature

Portland, Portland International Jetport (12.4 miles)

  • Lowest 2 August, 2025

    54.6 °F

  • Average August

    70.2 °F

  • Highest 11 August, 2025

    91.7 °F

Climate (2020–Present)

Portland, Portland International Jetport (12.4 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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