Potomac River - Hollis Marsh Weather Forecast

    • 74
    • 83

    Mostly Sunny

    • 73
    • 83

    Mostly Sunny

    • 77
    • 85

    Mostly Sunny

    • 80
    • 91

    Mostly Sunny

    • 79
    • 90

    Chance Thunderstorms

    • 78
    • 86

    Chance Thunderstorms

Today 22 Jul Westmoreland

Sunny. Highs in the mid 80s. Northeast Winds 5 to 10 Mph.

Tonight 22 Jul Westmoreland

Mostly clear. Lows in the upper 60s. East Winds around 5 Mph.

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  • Temperature Real-Time

Potomac River - Hollis Marsh Temperature Statistics

July Temperature

St Marys County Airport (14.9 miles)

  • Lowest 5 July, 2025

    62.6 °F

  • Average July

    78.2 °F

  • Highest 1 July, 2025

    91.4 °F

Climate (2020–Present)

St Marys County Airport (14.9 miles)

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  • Average Low 2020–2025

    49.6 °F

  • Average 2020–2025

    58.1 °F

  • Average High 2020–2025

    66.7 °F
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