Potomac River - Saint Margaret Island Weather Forecast

    • 48
    • 59

    Sunny

    • 53
    • 64

    Partly Sunny

    • 53
    • 67

    Partly Sunny

    • 51
    • 63

    Partly Sunny

    • 53
    • 65

    Mostly Sunny

    • 53
    • 65

    Partly Sunny

Today 18 Oct St. Marys

Sunny. Highs around 60. Northeast Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 18 Oct St. Marys

Clear. Lows in the upper 40s. Northeast Winds 5 to 10 Mph.

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Potomac River - Saint Margaret Island Temperature Statistics

October Temperature

St Marys County Airport (14.3 miles)

  • Lowest 7 October, 2026

    44.2 °F

  • Average October

    65.5 °F

  • Highest 14 October, 2026

    89.8 °F

Climate (2021–2026)

St Marys County Airport (14.3 miles)

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  • Average Low 2021–2026

    49.5 °F

  • Average 2021–2026

    58.1 °F

  • Average High 2021–2026

    67 °F
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