Flat Lick Stream Valley Park Weather Forecast

    • 61
    • 84

    Increasing Clouds

    • 59
    • 84

    Partly Sunny

    • 63
    • 86

    Partly Sunny

    • 70
    • 89

    Mostly Sunny

    • 65
    • 90

    Partly Sunny

    • 60
    • 83

    Mostly Sunny

Today 6 Sep Eastern Loudoun

Mostly sunny. Highs in the lower 80s. North Winds 5 to 10 Mph.

Tonight 6 Sep Eastern Loudoun

Partly cloudy. Lows in the lower 60s. North Winds around 5 Mph.

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Flat Lick Stream Valley Park Temperature Statistics

September Temperature

Washington/Dulles International Airport, DC (4.3 miles)

  • Lowest 3 September, 2026

    71.1 °F

  • Average September

    82.5 °F

  • Highest 1 September, 2026

    94.6 °F

Climate (2021–2026)

Washington/Dulles International Airport, DC (4.3 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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