Potomac River - Marshall Hall Weather Forecast

    • 45
    • 61

    Chance Rain

    • 54
    • 67

    Mostly Sunny

    • 54
    • 69

    Rain Showers

    • 52
    • 67

    Mostly Sunny

    • 57
    • 70

    Partly Sunny

    • 61
    • 77

    Partly Sunny

Today 11 May Charles

Cloudy with a 50 percent chance of Showers. Cooler with Highs around 60. Northwest Winds 5 to 10 Mph.

Tonight 11 May Charles

Partly cloudy in the Evening, then clearing. Lows in the lower 40s. Southwest Winds 5 to 10 Mph, becoming northwest after midnight.

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Potomac River - Marshall Hall Temperature Statistics

May Temperature

Fort Belvoir (5 miles)

  • Lowest 1 May, 2026

    37.4 °F

  • Average May

    59.2 °F

  • Highest 5 May, 2026

    85.3 °F

Climate (2021–Present)

Fort Belvoir (5 miles)

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  • Average Low 2021–2026

    47.7 °F

  • Average 2021–2026

    58 °F

  • Average High 2021–2026

    68.3 °F
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