Potomac River - Sandyland Beach Weather Forecast

    • 36
    • 46

    Decreasing Clouds

    • 31
    • 40

    Partly Sunny

    • 33
    • 37

    Chance Snow

    • 29
    • 44

    Chance Snow

    • 24
    • 35

    Mostly Sunny

    • 28
    • 32

    Mostly Sunny

    • 33
    • 39

    Partly Sunny

Today 10 Dec St. Marys

Mostly cloudy. Highs in the mid 40s. Southwest Winds 15 to 20 Mph with Gusts up to 35 Mph.

Tonight 10 Dec St. Marys

Mostly cloudy this Evening, then becoming partly cloudy. Lows in the lower 30s. Southwest Winds 15 to 20 Mph, becoming west 10 to 15 Mph after midnight. Gusts up to 35 Mph.

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  • Temperature Real-Time

Potomac River - Sandyland Beach Temperature Statistics

December Temperature

St Marys County Airport (8.1 miles)

  • Lowest 4 December, 2025

    27.7 °F

  • Average December

    34.7 °F

  • Highest 4 December, 2025

    48.2 °F

Climate (2020–Present)

St Marys County Airport (8.1 miles)

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  • Average Low 2020–2025

    49.5 °F

  • Average 2020–2025

    58 °F

  • Average High 2020–2025

    66.7 °F
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