Chantilly Highlands Weather Forecast

    • 18
    • 30

    Decreasing Clouds

    • 26
    • 38

    Mostly Sunny

    • 29
    • 49

    Mostly Cloudy

    • 36
    • 54

    Mostly Cloudy

    • 23
    • 46

    Partly Sunny

    • 36
    • 43

    Mostly Cloudy

Today 15 Dec Eastern Loudoun

Mostly sunny. Highs around 30. West Winds 5 to 10 Mph with Gusts up to 20 Mph.

Tonight 15 Dec Eastern Loudoun

Mostly clear. Cold with Lows around 16. Northwest Winds 10 to 15 Mph with Gusts up to 30 Mph.

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Chantilly Highlands Temperature Statistics

December Temperature

Washington/Dulles International Airport, DC (1.9 miles)

  • Lowest 9 December, 2025

    14 °F

  • Average December

    32.8 °F

  • Highest 10 December, 2025

    45 °F

Climate (2020–Present)

Washington/Dulles International Airport, DC (1.9 miles)

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  • Average Low 2020–2025

    47.7 °F

  • Average 2020–2025

    58.2 °F

  • Average High 2020–2025

    68.4 °F
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