Potomac River - Calvert Bay Weather Forecast

    • 44
    • 50

    Mostly Cloudy

    • 54
    • 59

    Slight Chance Rain Showers

    • 48
    • 66

    Rain Showers

    • 41
    • 56

    Mostly Sunny

    • 49
    • 61

    Mostly Sunny

    • 51
    • 66

    Mostly Cloudy

Today 14 Mar St. Marys

Mostly cloudy. Highs in the lower 50s. East Winds around 5 Mph.

Tonight 14 Mar St. Marys

Mostly cloudy. Patchy drizzle after midnight. Patchy fog after midnight. Visibility one quarter mile or less at Times after midnight. Lows in the lower 40s. Southeast Winds around 5 Mph.

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  • Temperature Forecast NOAA

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Potomac River - Calvert Bay Temperature Statistics

March Temperature

St. Inigoes, Webster Field, Naval Electronic Systems Engineering Activity (3.1 miles)

  • Lowest 2 March, 2025

    24.8 °F

  • Average March

    46.2 °F

  • Highest 1 March, 2025

    69.7 °F

Climate (2020–Present)

St. Inigoes, Webster Field, Naval Electronic Systems Engineering Activity (3.1 miles)

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  • Average Low 2020–2025

    52.5 °F

  • Average 2020–2025

    60.8 °F

  • Average High 2020–2025

    69.3 °F
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