Potomac Weather Forecast

    • 30
    • 55

    Rain Showers

    • 34
    • 35

    Rain/Sleet

    • 33
    • 45

    Mostly Cloudy

    • 44
    • 49

    Rain Likely

    • 26
    • 58

    Chance Rain

    • 25
    • 36

    Partly Sunny

Today 25 Dec Arlington/Falls Church/Alexandria

Mostly cloudy with scattered Showers late this Morning, then partly sunny this afternoon. Highs in the mid 50s. Southwest Winds 5 to 10 Mph, becoming northwest this afternoon. Chance of rain 40 percent.

Tonight 25 Dec Arlington/Falls Church/Alexandria

Mostly clear in the Evening, then becoming partly cloudy. Lows around 30. North Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Potomac Temperature Statistics

December Temperature

Washington/Reagan National Airport, DC (1.9 miles)

  • Lowest 15 December, 2025

    18 °F

  • Average December

    36.2 °F

  • Highest 19 December, 2025

    59 °F

Climate (2020–Present)

Washington/Reagan National Airport, DC (1.9 miles)

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  • Average Low 2020–2025

    52.5 °F

  • Average 2020–2025

    60.3 °F

  • Average High 2020–2025

    69.1 °F
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