Potomac River - Nomini Bay Weather Forecast

    • 76
    • 90

    Chance Thunderstorms

    • 73
    • 88

    Mostly Sunny

    • 75
    • 90

    Mostly Sunny

    • 73
    • 87

    Rain Showers Likely

    • 73
    • 81

    Rain Showers Likely

    • 73
    • 81

    Rain Showers Likely

    • 71
    • 81

    Chance Rain Showers

Today 17 Aug Westmoreland

Mostly sunny. Highs in the lower 90s. Northwest Winds 5 to 10 Mph. Heat index Values up to 100.

Tonight 17 Aug Westmoreland

Mostly cloudy. Showers likely with a chance of Thunderstorms early this Evening, then a chance of Showers with a slight chance of Thunderstorms. Lows in the mid 70s. West Winds around 5 Mph. Chance of rain 60 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Potomac River - Nomini Bay Temperature Statistics

August Temperature

St Marys County Airport (14.3 miles)

  • Lowest 1 August, 2026

    69.1 °F

  • Average August

    79.7 °F

  • Highest 9 August, 2026

    92.3 °F

Climate (2021–2026)

St Marys County Airport (14.3 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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