Potomac River - Port Sunlight Beach Weather Forecast

    • 68
    • 78

    Becoming Sunny

    • 68
    • 80

    Partly Sunny

    • 69
    • 79

    Partly Sunny

    • 71
    • 81

    Chance Rain Showers

    • 72
    • 85

    Chance Thunderstorms

    • 72
    • 86

    Chance Thunderstorms

Today 23 Jul St. Marys

Mostly sunny. A slight chance of Showers in the morning. Highs in the upper 70s. North Winds 5 to 10 Mph. Chance of rain 20 percent.

Tonight 23 Jul St. Marys

Mostly clear. Lows in the mid 60s. Northeast Winds around 5 Mph.

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Potomac River - Port Sunlight Beach Temperature Statistics

July Temperature

St Marys County Airport (11.8 miles)

  • Lowest 13 July, 2026

    63.9 °F

  • Average July

    80.4 °F

  • Highest 3 July, 2026

    100 °F

Climate (2021–2026)

St Marys County Airport (11.8 miles)

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  • Average Low 2021–2026

    49.4 °F

  • Average 2021–2026

    58 °F

  • Average High 2021–2026

    66.9 °F
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