Potomac River - Breton Beach Weather Forecast

    • 62
    • 71

    Mostly Cloudy

    • 63
    • 75

    Partly Sunny

    • 66
    • 79

    Partly Sunny

    • 69
    • 82

    Mostly Sunny

    • 63
    • 82

    Slight Chance Rain Showers

    • 60
    • 70

    Chance Rain Showers

Today 28 Sep St. Marys

Mostly cloudy. A slight chance of Showers in the morning. Highs around 70. Northwest Winds 5 to 10 Mph. Chance of rain 20 percent.

Tonight 28 Sep St. Marys

Mostly cloudy. Lows in the lower 60s. Northwest Winds around 5 Mph.

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Potomac River - Breton Beach Temperature Statistics

September Temperature

St Marys County Airport (8.7 miles)

  • Lowest 15 September, 2026

    53.2 °F

  • Average September

    73.1 °F

  • Highest 1 September, 2026

    93.9 °F

Climate (2021–2026)

St Marys County Airport (8.7 miles)

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  • Average Low 2021–2026

    49.5 °F

  • Average 2021–2026

    58.2 °F

  • Average High 2021–2026

    67 °F
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