Potomac River - Old Breton Beach Weather Forecast

    • 80
    • 85

    Slight Chance Thunderstorms

    • 78
    • 85

    Slight Chance Thunderstorms

    • 77
    • 88

    Chance Thunderstorms

    • 75
    • 87

    Chance Thunderstorms

    • 72
    • 83

    Partly Sunny

    • 70
    • 80

    Partly Sunny

Today 1 Sep St. Marys

Mostly sunny. A slight chance of Showers and Thunderstorms this afternoon. Hot with Highs in the lower 90s. Southwest Winds 5 to 10 Mph. Chance of rain 20 percent.

Tonight 1 Sep St. Marys

Partly cloudy with a slight chance of Showers. Isolated Thunderstorms. Lows in the mid 70s. South Winds 5 to 10 Mph, becoming west after midnight. Chance of rain 20 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Potomac River - Old Breton Beach Temperature Statistics

September Temperature

St Marys County Airport (8.7 miles)

  • Lowest

    –

  • Average September

    –

  • Highest

    –

Climate (2021–2026)

St Marys County Airport (8.7 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    49.4 °F

  • Average 2021–2026

    58.1 °F

  • Average High 2021–2026

    66.9 °F
Get WillyWeather+ to remove ads