Rosemont Weather Forecast

    • 28
    • 60

    Rain Showers

    • 37
    • 45

    Mostly Sunny

    • 26
    • 50

    Partly Sunny

    • 31
    • 41

    Chance Rain

    • 39
    • 48

    Mostly Cloudy

    • 37
    • 51

    Mostly Cloudy

Today 19 Dec Arlington/Falls Church/Alexandria

Partly sunny with isolated Showers. Breezy with Highs in the upper 50s. Temperature falling into the lower 40s. West Winds 20 to 25 Mph with Gusts up to 50 Mph. Chance of rain 20 percent.

Tonight 19 Dec Arlington/Falls Church/Alexandria

Partly cloudy and breezy. Lows in the upper 20s. West Winds 20 to 25 Mph with Gusts up to 50 Mph, becoming northwest 5 to 10 Mph with Gusts up to 20 Mph after midnight.

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Rosemont Temperature Statistics

December Temperature

Washington/Reagan National Airport, DC (2.5 miles)

  • Lowest 15 December, 2025

    18 °F

  • Average December

    34.3 °F

  • Highest 17 December, 2025

    50 °F

Climate (2020–Present)

Washington/Reagan National Airport, DC (2.5 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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