Chantilly Weather Forecast

    • 42
    • 64

    Sunny

    • 43
    • 65

    Sunny

    • 36
    • 60

    Mostly Sunny

    • 39
    • 60

    Mostly Sunny

    • 42
    • 64

    Mostly Sunny

    • 47
    • 68

    Mostly Sunny

Today 21 Oct Eastern Loudoun

Sunny. Highs in the lower 60s. North Winds 5 to 10 Mph.

Tonight 21 Oct Eastern Loudoun

Mostly clear. Lows around 40. Northwest Winds around 5 Mph.

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Chantilly Temperature Statistics

October Temperature

Washington/Dulles International Airport, DC (2.5 miles)

  • Lowest 18 October, 2026

    37 °F

  • Average October

    64.4 °F

  • Highest 2 October, 2026

    89.7 °F

Climate (2021–2026)

Washington/Dulles International Airport, DC (2.5 miles)

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  • Average Low 2021–2026

    47.6 °F

  • Average 2021–2026

    58.3 °F

  • Average High 2021–2026

    68.6 °F
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