Potomac River - Saint Margaret Island Weather Forecast

    • 41
    • 49

    Mostly Cloudy

    • 44
    • 51

    Mostly Cloudy

    • 58
    • 66

    Rain Showers Likely

    • 49
    • 65

    Rain Showers

    • 42
    • 55

    Mostly Sunny

    • 51
    • 62

    Mostly Sunny

    • 53
    • 71

    Partly Sunny

Today 13 Mar St. Marys

Partly sunny. Highs in the lower 50s. Northeast Winds 5 to 10 Mph.

Tonight 13 Mar St. Marys

Mostly cloudy. Patchy fog after midnight. Lows in the lower 40s. Northeast Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Potomac River - Saint Margaret Island Temperature Statistics

March Temperature

St Marys County Airport (14.3 miles)

  • Lowest 3 March, 2025

    21.2 °F

  • Average March

    44.2 °F

  • Highest 1 March, 2025

    68 °F

Climate (2020–Present)

St Marys County Airport (14.3 miles)

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  • Average Low 2020–2025

    49.4 °F

  • Average 2020–2025

    57.8 °F

  • Average High 2020–2025

    66.5 °F
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