Potomac River - Marshall Hall Weather Forecast

    • 66
    • 80

    Mostly Cloudy

    • 69
    • 84

    Mostly Sunny

    • 66
    • 87

    Chance Rain Showers

    • 59
    • 70

    Rain Showers Likely

    • 57
    • 67

    Chance Rain Showers

    • 47
    • 68

    Mostly Sunny

Today 30 Sep Charles

Mostly sunny. Highs around 80. Southwest Winds around 5 Mph.

Tonight 30 Sep Charles

Mostly cloudy. Lows in the lower 60s. South Winds around 5 Mph.

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Potomac River - Marshall Hall Temperature Statistics

September Temperature

Fort Belvoir (5 miles)

  • Lowest 25 September, 2026

    52 °F

  • Average September

    72.2 °F

  • Highest 1 September, 2026

    96.4 °F

Climate (2021–2026)

Fort Belvoir (5 miles)

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  • Average Low 2021–2026

    47.8 °F

  • Average 2021–2026

    58.2 °F

  • Average High 2021–2026

    68.3 °F
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