Chantilly Weather Forecast

    • 20
    • 32

    Decreasing Clouds

    • 31
    • 38

    Mostly Cloudy

    • 27
    • 46

    Chance Rain/Snow

    • 17
    • 32

    Slight Chance Snow

    • 14
    • 35

    Partly Sunny

    • 11
    • 26

    Mostly Sunny

Today 15 Jan Eastern Loudoun

Partly sunny. Cooler with Highs in the lower 30s. West Winds 15 to 20 Mph with Gusts up to 30 Mph.

Tonight 15 Jan Eastern Loudoun

Partly cloudy in the Evening, then becoming mostly clear. Lows around 20. West Winds 10 to 15 Mph with Gusts up to 35 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Chantilly Temperature Statistics

January Temperature

Washington/Dulles International Airport, DC (2.5 miles)

  • Lowest 13 January, 2026

    21.9 °F

  • Average January

    38.4 °F

  • Highest 7 January, 2026

    61 °F

Climate (2021–Present)

Washington/Dulles International Airport, DC (2.5 miles)

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  • Average Low 2021–2026

    47.6 °F

  • Average 2021–2026

    58.2 °F

  • Average High 2021–2026

    68.4 °F
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