Chantilly Weather Forecast

    • 66
    • 77

    Cloudy

    • 66
    • 74

    Chance Rain Showers

    • 67
    • 81

    Mostly Cloudy

    • 63
    • 82

    Slight Chance Rain Showers

    • 65
    • 86

    Partly Sunny

    • 69
    • 87

    Slight Chance Thunderstorms

    • 64
    • 86

    Chance Rain Showers

Today 18 Aug Eastern Loudoun

Cloudy with a 20 percent chance of Showers. Highs in the mid 70s. Northeast Winds around 10 Mph.

Tonight 18 Aug Eastern Loudoun

Mostly cloudy. A slight chance of Showers after midnight. Lows in the mid 60s. Northeast Winds 5 to 10 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Chantilly Temperature Statistics

August Temperature

Washington/Dulles International Airport, DC (2.5 miles)

  • Lowest 10 August, 2025

    54.6 °F

  • Average August

    74.7 °F

  • Highest 14 August, 2025

    94.6 °F

Climate (2020–Present)

Washington/Dulles International Airport, DC (2.5 miles)

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  • Average Low 2020–2025

    47.8 °F

  • Average 2020–2025

    58.3 °F

  • Average High 2020–2025

    68.5 °F
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