Potomac River - St Marys River Entrance Weather Forecast

    • 39
    • 53

    Decreasing Clouds

    • 49
    • 57

    Rain

    • 46
    • 58

    Rain

    • 30
    • 52

    Chance Rain

    • 32
    • 42

    Mostly Sunny

    • 37
    • 48

    Partly Sunny

Today 8 Jan St. Marys

Partly sunny. Highs in the mid 50s. Southeast Winds around 5 Mph.

Tonight 8 Jan St. Marys

Partly cloudy. Lows in the upper 30s. Southeast Winds around 5 Mph.

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Potomac River - St Marys River Entrance Temperature Statistics

January Temperature

St. Inigoes, Webster Field, Naval Electronic Systems Engineering Activity (1.9 miles)

  • Lowest 1 January, 2026

    26.1 °F

  • Average January

    35 °F

  • Highest 6 January, 2026

    54 °F

Climate (2021–Present)

St. Inigoes, Webster Field, Naval Electronic Systems Engineering Activity (1.9 miles)

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  • Average Low 2021–2026

    51.9 °F

  • Average 2021–2026

    60.4 °F

  • Average High 2021–2026

    68.8 °F
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