Potomac River - Marshall Hall Weather Forecast

    • 50
    • 67

    Rain Showers

    • 45
    • 65

    Increasing Clouds

    • 53
    • 76

    Rain Showers

    • 37
    • 61

    Rain Showers

    • 39
    • 50

    Mostly Cloudy

    • 40
    • 55

    Partly Sunny

    • 49
    • 63

    Chance Rain

Today 20 Mar Charles

Mostly cloudy. Highs around 70. Southwest Winds around 15 Mph with Gusts up to 30 Mph.

Tonight 20 Mar Charles

Mostly cloudy. Scattered Showers with isolated Thunderstorms late this Evening, then scattered Showers. Lows in the upper 40s. Southwest Winds 10 to 15 Mph. Chance of rain 50 percent.

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Potomac River - Marshall Hall Temperature Statistics

March Temperature

Fort Belvoir (5 miles)

  • Lowest 13 March, 2026

    25.3 °F

  • Average March

    51 °F

  • Highest 11 March, 2026

    86.5 °F

Climate (2021–Present)

Fort Belvoir (5 miles)

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  • Average Low 2021–2026

    47.6 °F

  • Average 2021–2026

    57.9 °F

  • Average High 2021–2026

    68.2 °F
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