Potomac River - Marshall Hall Weather Forecast

    • 40
    • 56

    Decreasing Clouds

    • 43
    • 58

    Mostly Cloudy

    • 59
    • 70

    Rain Showers Likely

    • 49
    • 72

    Rain Showers

    • 42
    • 57

    Mostly Sunny

    • 52
    • 66

    Partly Sunny

    • 54
    • 74

    Mostly Cloudy

Today 13 Mar Charles

Partly sunny. Highs in the mid 50s. Northeast Winds around 5 Mph.

Tonight 13 Mar Charles

Mostly cloudy. Patchy fog after midnight. Lows around 40. Northeast Winds around 5 Mph.

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Potomac River - Marshall Hall Temperature Statistics

March Temperature

Fort Belvoir (5 miles)

  • Lowest 3 March, 2025

    21.6 °F

  • Average March

    45.8 °F

  • Highest 11 March, 2025

    72.9 °F

Climate (2020–Present)

Fort Belvoir (5 miles)

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  • Average Low 2020–2025

    47.8 °F

  • Average 2020–2025

    57.9 °F

  • Average High 2020–2025

    68.2 °F
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