Potomac River - Cornish Point Weather Forecast

    • 47
    • 73

    Rain Showers Likely

    • 36
    • 51

    Rain Showers Likely

    • 45
    • 52

    Mostly Cloudy

    • 44
    • 53

    Partly Sunny

    • 53
    • 60

    Rain

    • 33
    • 61

    Rain Likely

Today 11 Mar St. Marys

Partly sunny. A chance of Showers this Morning, then a chance of Showers and Thunderstorms this afternoon. Highs in the upper 70s. South Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 40 percent.

Tonight 11 Mar St. Marys

Partly cloudy with a slight chance of Showers and Thunderstorms in the Evening, then mostly cloudy with a chance of Showers after midnight. Some Thunderstorms may be severe with damaging Winds and large hail. Lows in the upper 40s. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 50 percent.

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  • Temperature Real-Time

Potomac River - Cornish Point Temperature Statistics

March Temperature

St Marys County Airport (10.6 miles)

  • Lowest 2 March, 2026

    31.5 °F

  • Average March

    48.9 °F

  • Highest 8 March, 2026

    72.5 °F

Climate (2021–Present)

St Marys County Airport (10.6 miles)

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  • Average Low 2021–2026

    49.3 °F

  • Average 2021–2026

    57.9 °F

  • Average High 2021–2026

    66.6 °F
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