Potomac River - Waterloo Point Weather Forecast

    • 31
    • 46

    Slight Chance Rain Showers

    • 32
    • 45

    Mostly Sunny

    • 42
    • 50

    Partly Sunny

    • 33
    • 50

    Chance Rain

    • 25
    • 38

    Chance Rain/Snow

    • 30
    • 39

    Partly Sunny

Today 11 Jan St. Marys

Partly sunny with a 20 percent chance of Showers. Highs in the upper 40s. Northwest Winds 15 to 20 Mph. Gusts up to 30 Mph, increasing to 40 Mph in the afternoon.

Tonight 11 Jan St. Marys

Mostly clear. Lows in the upper 20s. Northwest Winds 15 to 20 Mph. Gusts up to 40 Mph, decreasing to 30 Mph after midnight.

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Potomac River - Waterloo Point Temperature Statistics

January Temperature

St Marys County Airport (13.7 miles)

  • Lowest 1 January, 2026

    24.3 °F

  • Average January

    37.8 °F

  • Highest 7 January, 2026

    65.7 °F

Climate (2021–Present)

St Marys County Airport (13.7 miles)

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  • Average Low 2021–2026

    49.5 °F

  • Average 2021–2026

    58 °F

  • Average High 2021–2026

    66.7 °F
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