Potomac River - Cornfield Harbor Weather Forecast

    • 69
    • 84

    Partly Sunny

    • 67
    • 78

    Partly Sunny

    • 67
    • 76

    Mostly Sunny

    • 68
    • 78

    Partly Sunny

    • 65
    • 78

    Slight Chance Thunderstorms

    • 66
    • 74

    Mostly Sunny

    • 67
    • 75

    Partly Sunny

Today 25 Aug St. Marys

Mostly sunny. Highs in the mid 80s. West Winds 5 to 10 Mph.

Tonight 25 Aug St. Marys

Partly cloudy. Lows in the lower 60s. Northwest Winds 5 to 10 Mph.

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Potomac River - Cornfield Harbor Temperature Statistics

August Temperature

St. Inigoes, Webster Field, Naval Electronic Systems Engineering Activity (6.8 miles)

  • Lowest 23 August, 2025

    57.9 °F

  • Average August

    74.4 °F

  • Highest 17 August, 2025

    90.6 °F

Climate (2020–Present)

St. Inigoes, Webster Field, Naval Electronic Systems Engineering Activity (6.8 miles)

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  • Average Low 2020–2025

    52.4 °F

  • Average 2020–2025

    60.8 °F

  • Average High 2020–2025

    69.2 °F
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