Potomac River - Cornfield Harbor Weather Forecast

    • 64
    • 73

    Decreasing Clouds

    • 67
    • 71

    Chance Rain Showers

    • 69
    • 72

    Rain Showers

    • 66
    • 73

    Slight Chance Rain Showers

    • 63
    • 76

    Mostly Sunny

    • 59
    • 68

    Mostly Sunny

Today 9 Oct St. Marys

Partly sunny. Highs in the mid 70s. Northwest Winds around 5 Mph.

Tonight 9 Oct St. Marys

Mostly cloudy. Lows in the upper 50s. Light and variable Winds, becoming northeast around 5 Mph after midnight.

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Potomac River - Cornfield Harbor Temperature Statistics

October Temperature

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

  • Lowest 6 October, 2026

    46.9 °F

  • Average October

    66.6 °F

  • Highest 2 October, 2026

    88 °F

Climate (2021–2026)

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

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  • Average Low 2021–2026

    51.8 °F

  • Average 2021–2026

    60.3 °F

  • Average High 2021–2026

    68.6 °F
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