Potomac River - Cornfield Harbor Weather Forecast

    • 78
    • 87

    Increasing Clouds

    • 76
    • 85

    Chance Rain Showers

    • 77
    • 83

    Partly Sunny

    • 79
    • 86

    Chance Rain Showers

    • 77
    • 88

    Chance Rain Showers

    • 77
    • 84

    Mostly Sunny

Today 13 Aug St. Marys

Mostly sunny. Highs in the upper 80s. Northwest Winds around 5 Mph.

Tonight 13 Aug St. Marys

Partly cloudy. Lows in the mid 70s. West Winds around 5 Mph, becoming north after midnight.

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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

    80.5 °F

  • Highest 9 August, 2026

    91 °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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