Potomac River - Saint Catherine Island Weather Forecast

    • 56
    • 69

    Rain Showers

    • 58
    • 73

    Mostly Sunny

    • 56
    • 72

    Chance Rain Showers

    • 51
    • 63

    Rain Showers Likely

    • 50
    • 61

    Chance Rain Showers

    • 54
    • 62

    Chance Rain Showers

Today 22 Apr St. Marys

Partly sunny with a 50 percent chance of Showers. Highs in the mid 70s. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 22 Apr St. Marys

Mostly clear. Lows in the mid 50s. Northwest Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Potomac River - Saint Catherine Island Temperature Statistics

April Temperature

St Marys County Airport (14.3 miles)

  • Lowest 9 April, 2026

    31.1 °F

  • Average April

    62.5 °F

  • Highest 16 April, 2026

    90 °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

    58 °F

  • Average High 2021–2026

    66.7 °F
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