Potomac River - Four Mile Run Entrance Weather Forecast

    • 28
    • 42

    Increasing Clouds

    • 21
    • 33

    Mostly Cloudy

    • 32
    • 38

    Mostly Cloudy

    • 36
    • 50

    Mostly Cloudy

    • 31
    • 46

    Chance Rain/Snow

    • 23
    • 41

    Chance Snow

    • 21
    • 35

    Partly Sunny

Today 7 Dec Arlington/Falls Church/Alexandria

Mostly sunny. Highs in the lower 40s. South Winds around 5 Mph.

Tonight 7 Dec Arlington/Falls Church/Alexandria

Mostly cloudy. Lows in the upper 20s. West Winds around 5 Mph, becoming north with Gusts up to 20 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Potomac River - Four Mile Run Entrance Temperature Statistics

December Temperature

Washington/Reagan National Airport, DC (0.6 miles)

  • Lowest 5 December, 2025

    28.4 °F

  • Average December

    36.8 °F

  • Highest 1 December, 2025

    46 °F

Climate (2020–Present)

Washington/Reagan National Airport, DC (0.6 miles)

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  • Average Low 2020–2025

    52.6 °F

  • Average 2020–2025

    60.4 °F

  • Average High 2020–2025

    69.2 °F
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