Potomac River - Marshall Hall Weather Forecast

    • 20
    • 36

    Breezy

    • 24
    • 31

    Decreasing Clouds

    • 31
    • 38

    Mostly Sunny

    • 34
    • 50

    Mostly Cloudy

    • 40
    • 56

    Rain

    • 28
    • 48

    Partly Sunny

    • 41
    • 43

    Mostly Cloudy

Today 14 Dec Charles

Mostly sunny. Highs in the lower 30s. Northwest Winds around 20 Mph with Gusts up to 30 Mph.

Tonight 14 Dec Charles

Partly cloudy this Evening, then becoming mostly clear. Cold with Lows around 17. Northwest Winds 15 to 20 Mph with Gusts up to 35 Mph.

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Potomac River - Marshall Hall Temperature Statistics

December Temperature

Fort Belvoir (5 miles)

  • Lowest 9 December, 2025

    17.4 °F

  • Average December

    34.7 °F

  • Highest 4 December, 2025

    47.5 °F

Climate (2020–Present)

Fort Belvoir (5 miles)

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  • Average Low 2020–2025

    47.8 °F

  • Average 2020–2025

    58 °F

  • Average High 2020–2025

    68.2 °F
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