Holly Knoll Park Weather Forecast

    • 58
    • 64

    Rain Showers Likely

    • 59
    • 69

    Mostly Cloudy

    • 59
    • 73

    Partly Sunny

    • 60
    • 78

    Partly Sunny

    • 65
    • 82

    Partly Sunny

    • 59
    • 78

    Chance Rain Showers

Today 27 Sep Eastern Loudoun

Cloudy. A chance of Showers in the Morning, then Showers likely in the afternoon. Highs in the mid 60s. Northwest Winds 15 to 20 Mph with Gusts up to 35 Mph. Chance of rain 60 percent.

Tonight 27 Sep Eastern Loudoun

Mostly cloudy. A chance of Showers in the evening. Lows in the upper 50s. Northwest Winds 10 to 15 Mph. Gusts up to 30 Mph in the evening. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Holly Knoll Park Temperature Statistics

September Temperature

Washington/Dulles International Airport, DC (6.8 miles)

  • Lowest 24 September, 2026

    51.1 °F

  • Average September

    73.4 °F

  • Highest 1 September, 2026

    94.6 °F

Climate (2021–2026)

Washington/Dulles International Airport, DC (6.8 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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