Potomac River - Cornfield Harbor Weather Forecast

    • 80
    • 88

    Becoming Sunny

    • 80
    • 88

    Chance Thunderstorms

    • 79
    • 88

    Chance Thunderstorms

    • 80
    • 87

    Mostly Sunny

    • 80
    • 88

    Slight Chance Thunderstorms

    • 80
    • 90

    Chance Rain Showers

Today 6 Aug St. Marys

Sunny. Highs around 90. Southwest Winds 5 to 10 Mph.

Tonight 6 Aug St. Marys

Partly cloudy in the Evening, then becoming mostly clear. Lows in the mid 70s. Southwest 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 1 August, 2026

    69.1 °F

  • Average August

    79 °F

  • Highest 1 August, 2026

    87.8 °F

Climate (2021–2026)

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

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  • Average Low 2021–2026

    51.9 °F

  • Average 2021–2026

    60.4 °F

  • Average High 2021–2026

    68.7 °F
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