Piney Branch Stream Valley Park Weather Forecast

    • 18
    • 31

    Becoming Sunny

    • 26
    • 38

    Mostly Sunny

    • 28
    • 50

    Mostly Cloudy

    • 40
    • 54

    Rain

    • 25
    • 48

    Partly Sunny

    • 36
    • 44

    Partly Sunny

    • 31
    • 52

    Slight Chance Rain

Today 15 Dec Eastern Loudoun

Mostly cloudy. Highs around 30. Southwest Winds around 5 Mph.

Tonight 15 Dec Eastern Loudoun

Mostly clear. Cold with Lows around 16. South Winds around 5 Mph in the Evening, becoming light and variable.

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Piney Branch Stream Valley Park Temperature Statistics

December Temperature

Washington/Dulles International Airport, DC (9.3 miles)

  • Lowest 9 December, 2025

    14 °F

  • Average December

    32.8 °F

  • Highest 10 December, 2025

    45 °F

Climate (2020–Present)

Washington/Dulles International Airport, DC (9.3 miles)

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  • Average Low 2020–2025

    47.7 °F

  • Average 2020–2025

    58.2 °F

  • Average High 2020–2025

    68.4 °F
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