Potomac River - Cornfield Harbor Weather Forecast

    • 47
    • 55

    Partly Sunny

    • 54
    • 59

    Mostly Sunny

    • 46
    • 68

    Rain

    • 37
    • 57

    Chance Rain

    • 46
    • 52

    Partly Sunny

    • 47
    • 54

    Partly Sunny

    • 48
    • 61

    Mostly Cloudy

Today 9 Mar St. Marys

Sunny. Highs in the lower 70s. Except in the mid 60s near the bay. South Winds around 5 Mph.

Tonight 9 Mar St. Marys

Mostly clear in the Evening, then becoming partly cloudy. Lows in the upper 40s. South Winds around 5 Mph.

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Potomac River - Cornfield Harbor Temperature Statistics

March Temperature

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

  • Lowest 2 March, 2026

    33.1 °F

  • Average March

    45.3 °F

  • Highest 7 March, 2026

    68 °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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