Potomac River - Gunston Cove Weather Forecast

    • 47
    • 54

    Rain

    • 28
    • 55

    Chance Rain

    • 39
    • 46

    Partly Sunny

    • 25
    • 52

    Mostly Sunny

    • 29
    • 40

    Mostly Cloudy

    • 38
    • 46

    Mostly Cloudy

Today 18 Dec Charles

Sunny early this Morning, then becoming partly sunny. A slight chance of rain this afternoon. Highs in the mid 50s. Southeast Winds 5 to 10 Mph. Chance of rain 20 percent.

Tonight 18 Dec Charles

Rain. Lows in the upper 40s. Temperature rising into the upper 50s after midnight. South Winds 15 to 20 Mph. Gusts up to 35 Mph after midnight. Chance of rain near 100 percent.

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  • Temperature Real-Time

Potomac River - Gunston Cove Temperature Statistics

December Temperature

Fort Belvoir (3.7 miles)

  • Lowest 16 December, 2025

    17.1 °F

  • Average December

    33.4 °F

  • Highest 4 December, 2025

    47.5 °F

Climate (2020–Present)

Fort Belvoir (3.7 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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