Potomac River - Marshall Hall Weather Forecast

    • 76
    • 91

    Thunderstorms

    • 74
    • 90

    Rain Showers Likely

    • 75
    • 87

    Chance Thunderstorms

    • 73
    • 89

    Chance Rain Showers

    • 70
    • 84

    Chance Rain Showers

    • 69
    • 85

    Partly Sunny

Today 10 Aug Charles

Sunny. A slight chance of Showers and Thunderstorms this afternoon. Highs in the lower 90s. West Winds 5 to 10 Mph. Chance of rain 20 percent.

Tonight 10 Aug Charles

Partly cloudy with a slight chance of Showers and Thunderstorms in the Evening, then mostly cloudy after midnight. Lows in the mid 70s. Southwest Winds 5 to 10 Mph, becoming west after midnight. Chance of rain 20 percent.

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Potomac River - Marshall Hall Temperature Statistics

August Temperature

Fort Belvoir (5 miles)

  • Lowest 1 August, 2026

    65.5 °F

  • Average August

    80.1 °F

  • Highest 8 August, 2026

    92.8 °F

Climate (2021–2026)

Fort Belvoir (5 miles)

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  • Average Low 2021–2026

    47.8 °F

  • Average 2021–2026

    58.1 °F

  • Average High 2021–2026

    68.3 °F
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