Potomac River - Cornfield Harbor Weather Forecast

    • 64
    • 71

    Breezy

    • 64
    • 72

    Slight Chance Rain Showers

    • 65
    • 71

    Mostly Cloudy

    • 66
    • 73

    Partly Sunny

    • 67
    • 75

    Mostly Sunny

    • 69
    • 77

    Partly Sunny

Today 25 Sep St. Marys

Mostly sunny. Highs in the lower 70s. North Winds 15 to 20 Mph with Gusts up to 30 Mph.

Tonight 25 Sep St. Marys

Partly cloudy in the Evening, then clearing. Lows in the upper 50s. North Winds 15 to 20 Mph with Gusts up to 30 Mph.

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  • Temperature Real-Time

Potomac River - Cornfield Harbor Temperature Statistics

September Temperature

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

  • Lowest 16 September, 2026

    59 °F

  • Average September

    75.8 °F

  • Highest 1 September, 2026

    91.9 °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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