Potomac River - Hollis Marsh Weather Forecast

    • 34
    • 57

    Rain Showers

    • 42
    • 44

    Mostly Sunny

    • 31
    • 50

    Partly Sunny

    • 34
    • 39

    Mostly Cloudy

    • 42
    • 45

    Slight Chance Rain

    • 42
    • 49

    Partly Sunny

Today 19 Dec Westmoreland

Mostly cloudy with a chance of rain this Morning, then mostly sunny this afternoon. Windy with Highs around 60. Temperature falling into the mid 40s this afternoon. Southwest Winds 15 to 20 Mph with Gusts up to 30 Mph, becoming west 20 to 25 Mph with Gusts up to 40 Mph this afternoon. Chance of rain 50 percent.

Tonight 19 Dec Westmoreland

Mostly clear and Breezy, Colder with Lows in the upper 20s. West Winds 15 to 20 Mph with Gusts up to 30 Mph, Diminishing to 5 to 10 Mph after midnight.

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Potomac River - Hollis Marsh Temperature Statistics

December Temperature

St Marys County Airport (14.9 miles)

  • Lowest 15 December, 2025

    14.9 °F

  • Average December

    33.5 °F

  • Highest 4 December, 2025

    48.2 °F

Climate (2020–Present)

St Marys County Airport (14.9 miles)

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  • Average Low 2020–2025

    49.5 °F

  • Average 2020–2025

    58 °F

  • Average High 2020–2025

    66.6 °F
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