Grantsville Weather Forecast

    • 53
    • 72

    Chance Rain Showers

    • 53
    • 79

    Mostly Sunny

    • 51
    • 80

    Mostly Sunny

    • 55
    • 75

    Partly Sunny

    • 53
    • 74

    Partly Sunny

    • 56
    • 78

    Partly Sunny

Today 17 Sep Eastern Garrett

Mostly cloudy with a 50 percent chance of Showers. Highs around 70. Northeast Winds around 5 Mph.

Tonight 17 Sep Eastern Garrett

Partly cloudy. Patchy fog after midnight. Lows in the mid 50s. East Winds around 5 Mph, becoming west after midnight.

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Grantsville Temperature Statistics

September Temperature

Garrett County Airport (12.4 miles)

  • Lowest 7 September, 2025

    48.2 °F

  • Average September

    61.4 °F

  • Highest 14 September, 2025

    77 °F

Climate (2020–Present)

Garrett County Airport (12.4 miles)

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  • Average Low 2020–2025

    41.8 °F

  • Average 2020–2025

    48.6 °F

  • Average High 2020–2025

    56.4 °F
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