Lake Millbrook Weather Forecast

    • 59
    • 70

    Chance Rain Showers

    • 61
    • 67

    Rain Showers Likely

    • 60
    • 82

    Partly Sunny

    • 60
    • 88

    Mostly Sunny

    • 60
    • 80

    Mostly Cloudy

    • 58
    • 77

    Mostly Cloudy

Today 16 Sep Northwest Prince William

Mostly cloudy with a chance of Showers. A slight chance of Thunderstorms in the afternoon. Highs in the lower 70s. Northeast Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 50 percent.

Tonight 16 Sep Northwest Prince William

Mostly cloudy. Lows in the upper 50s. North Winds 5 to 10 Mph.

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Lake Millbrook Temperature Statistics

September Temperature

Manassas, Manassas Regional Airport/Harry P. Davis Field (11.8 miles)

  • Lowest 8 September, 2025

    44.1 °F

  • Average September

    67.4 °F

  • Highest 6 September, 2025

    91 °F

Climate (2020–Present)

Manassas, Manassas Regional Airport/Harry P. Davis Field (11.8 miles)

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  • Average Low 2020–2025

    46 °F

  • Average 2020–2025

    57 °F

  • Average High 2020–2025

    68 °F
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