Potomac River - Cornish Point Weather Forecast

    • 57
    • 67

    Increasing Clouds

    • 57
    • 69

    Partly Sunny

    • 55
    • 72

    Mostly Sunny

    • 54
    • 65

    Mostly Cloudy

    • 58
    • 68

    Mostly Cloudy

    • 59
    • 68

    Chance Rain Showers

Today 28 Oct St. Marys

Mostly sunny. Highs in the upper 60s. East Winds around 5 Mph.

Tonight 28 Oct St. Marys

Mostly cloudy. Patchy fog. Lows in the lower 50s. East Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Potomac River - Cornish Point Temperature Statistics

October Temperature

St Marys County Airport (10.6 miles)

  • Lowest 19 October, 2026

    38.1 °F

  • Average October

    60.6 °F

  • Highest 14 October, 2026

    89.8 °F

Climate (2021–2026)

St Marys County Airport (10.6 miles)

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  • Average Low 2021–2026

    49.4 °F

  • Average 2021–2026

    58.1 °F

  • Average High 2021–2026

    66.9 °F
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