Potomac River - Cornfield Harbor Weather Forecast

    • 49
    • 58

    Mostly Cloudy

    • 40
    • 55

    Becoming Sunny

    • 44
    • 50

    Mostly Sunny

    • 52
    • 56

    Partly Sunny

    • 55
    • 64

    Partly Sunny

    • 57
    • 68

    Partly Sunny

    • 59
    • 68

    Partly Sunny

Today 6 Apr St. Marys

Mostly sunny. Highs in the lower 60s. Southwest Winds 5 to 10 Mph.

Tonight 6 Apr St. Marys

Mostly cloudy in the Evening, then becoming partly cloudy. Lows in the mid 40s. South Winds 5 to 10 Mph, becoming northwest after midnight.

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Potomac River - Cornfield Harbor Temperature Statistics

April Temperature

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

  • Lowest 2 April, 2026

    50 °F

  • Average April

    66.2 °F

  • Highest 1 April, 2026

    82.9 °F

Climate (2021–Present)

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

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  • Average Low 2021–2026

    52 °F

  • Average 2021–2026

    60.5 °F

  • Average High 2021–2026

    68.9 °F
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