Potomac River - Bullock Island Weather Forecast

    • 68
    • 83

    Mostly Sunny

    • 68
    • 75

    Partly Sunny

    • 65
    • 73

    Mostly Cloudy

    • 68
    • 75

    Partly Sunny

    • 69
    • 80

    Partly Sunny

    • 68
    • 78

    Mostly Cloudy

Today 19 Sep St. Marys

Sunny. Highs in the mid 80s. Northwest Winds around 5 Mph.

Tonight 19 Sep St. Marys

Mostly clear. Lows in the lower 60s. South Winds around 5 Mph, becoming northeast after midnight.

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Potomac River - Bullock Island Temperature Statistics

September Temperature

St Marys County Airport (13.7 miles)

  • Lowest 3 September, 2025

    53.2 °F

  • Average September

    68.3 °F

  • Highest 4 September, 2025

    86.9 °F

Climate (2020–Present)

St Marys County Airport (13.7 miles)

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  • Average Low 2020–2025

    49.6 °F

  • Average 2020–2025

    58.1 °F

  • Average High 2020–2025

    66.8 °F
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