Potomac River - Saint Catherine Island Weather Forecast

    • 61
    • 61

    Chance Rain Showers

    • 48
    • 68

    Rain Showers

    • 49
    • 65

    Mostly Sunny

    • 58
    • 72

    Partly Sunny

    • 56
    • 76

    Rain Likely

    • 36
    • 67

    Rain Likely

    • 44
    • 50

    Mostly Cloudy

Today 7 Mar St. Marys

Sunny. Highs in the lower 60s. South Winds 5 to 10 Mph.

Tonight 7 Mar St. Marys

Partly cloudy in the Evening, then mostly cloudy with a chance of Showers after midnight. Warmer with Lows in the lower 60s. Southwest Winds 10 to 15 Mph. Chance of rain 30 percent.

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  • Temperature Real-Time

Potomac River - Saint Catherine Island Temperature Statistics

March Temperature

St Marys County Airport (14.3 miles)

  • Lowest 2 March, 2026

    31.5 °F

  • Average March

    42.8 °F

  • Highest 5 March, 2026

    61.7 °F

Climate (2021–Present)

St Marys County Airport (14.3 miles)

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  • Average Low 2021–2026

    49.3 °F

  • Average 2021–2026

    57.8 °F

  • Average High 2021–2026

    66.6 °F
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