Potomac River - Colton Point Weather Forecast

    • 63
    • 73

    Decreasing Clouds

    • 66
    • 79

    Partly Sunny

    • 69
    • 84

    Mostly Sunny

    • 68
    • 85

    Partly Sunny

    • 64
    • 75

    Rain Showers Likely

    • 60
    • 71

    Rain Showers Likely

Today 29 Sep St. Marys

Mostly cloudy. Highs in the lower 70s. Northwest Winds around 5 Mph.

Tonight 29 Sep St. Marys

Partly cloudy in the Evening, then clearing. Patchy fog after midnight. Lows around 60. Light and variable Winds, becoming west around 5 Mph after midnight.

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Potomac River - Colton Point Temperature Statistics

September Temperature

St Marys County Airport (12.4 miles)

  • Lowest 15 September, 2026

    53.2 °F

  • Average September

    72.1 °F

  • Highest 1 September, 2026

    93.9 °F

Climate (2021–2026)

St Marys County Airport (12.4 miles)

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  • Average Low 2021–2026

    49.5 °F

  • Average 2021–2026

    58.2 °F

  • Average High 2021–2026

    67 °F
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