Chantilly Weather Forecast

    • 66
    • 79

    Rain Showers Likely

    • 61
    • 83

    Mostly Sunny

    • 59
    • 81

    Mostly Sunny

    • 62
    • 82

    Partly Sunny

    • 68
    • 86

    Chance Rain Showers

    • 68
    • 85

    Rain Showers Likely

Today 22 Aug Eastern Loudoun

Mostly cloudy with scattered Showers this Morning, then partly sunny with scattered Showers and Thunderstorms this afternoon. Highs in the upper 70s. East Winds around 5 Mph. Chance of rain 50 percent.

Tonight 22 Aug Eastern Loudoun

Mostly cloudy. Showers likely with a chance of Thunderstorms in the Evening, then a chance of Showers after midnight. Lows in the mid 60s. Southeast Winds around 5 Mph, becoming southwest after midnight. Chance of rain 60 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 19 August, 2026

    63 °F

  • Average August

    79.6 °F

  • Highest 10 August, 2026

    92.6 °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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