Potomac River - Marshall Hall Weather Forecast

    • 79
    • 92

    Slight Chance Thunderstorms

    • 75
    • 86

    Chance Thunderstorms

    • 75
    • 83

    Rain Showers Likely

    • 73
    • 88

    Chance Thunderstorms

    • 70
    • 82

    Chance Rain Showers

    • 71
    • 83

    Chance Rain Showers

Today 17 Jul Charles

Mostly sunny. Hot with Highs in the mid 90s. Southwest Winds around 10 Mph with Gusts up to 20 Mph. Heat index Values up to 108.

Tonight 17 Jul Charles

Partly cloudy. A slight chance of Showers and Thunderstorms in the evening. Lows in the mid 70s. Southwest Winds 5 to 10 Mph with Gusts up to 20 Mph, becoming west after midnight. Chance of rain 20 percent.

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Potomac River - Marshall Hall Temperature Statistics

July Temperature

Fort Belvoir (5 miles)

  • Lowest 5 July, 2025

    61.7 °F

  • Average July

    80.1 °F

  • Highest 8 July, 2025

    96.3 °F

Climate (2020–Present)

Fort Belvoir (5 miles)

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  • Average Low 2020–2025

    48 °F

  • Average 2020–2025

    58.1 °F

  • Average High 2020–2025

    68.4 °F
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