Potomac River - Deep Point Weather Forecast

    • 72
    • 81

    Rain Showers

    • 73
    • 84

    Rain Showers Likely

    • 65
    • 80

    Mostly Sunny

    • 66
    • 79

    Mostly Sunny

    • 66
    • 79

    Mostly Sunny

    • 69
    • 82

    Partly Sunny

    • 69
    • 84

    Partly Sunny

Today 12 Sep St. Marys

Mostly cloudy with scattered Showers and Thunderstorms. Highs in the lower 80s. Southeast Winds around 10 Mph with Gusts up to 20 Mph. Chance of rain 40 percent.

Tonight 12 Sep St. Marys

Scattered Showers and Thunderstorms in the Evening, then Showers with isolated Thunderstorms after midnight. Lows around 70. Southeast Winds 5 to 10 Mph with Gusts up to 20 Mph, becoming south after midnight. Chance of rain 90 percent.

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Potomac River - Deep Point Temperature Statistics

September Temperature

St. Inigoes, Webster Field, Naval Electronic Systems Engineering Activity (4.3 miles)

  • Lowest 7 September, 2026

    64.9 °F

  • Average September

    77.7 °F

  • Highest 1 September, 2026

    91.9 °F

Climate (2021–2026)

St. Inigoes, Webster Field, Naval Electronic Systems Engineering Activity (4.3 miles)

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  • Average Low 2021–2026

    51.9 °F

  • Average 2021–2026

    60.3 °F

  • Average High 2021–2026

    68.7 °F
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