Lake Manassas Weather Forecast

    • 25
    • 41

    Mostly Sunny

    • 28
    • 52

    Increasing Clouds

    • 41
    • 54

    Rain

    • 25
    • 51

    Chance Rain

    • 34
    • 46

    Mostly Cloudy

    • 27
    • 53

    Partly Sunny

    • 29
    • 43

    Mostly Cloudy

Today 16 Dec Southern Fauquier

Sunny. Highs in the lower 40s. South Winds around 5 Mph.

Tonight 16 Dec Southern Fauquier

Mostly clear. Lows in the mid 20s. South Winds around 5 Mph.

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Lake Manassas Temperature Statistics

December Temperature

Manassas, Manassas Regional Airport/Harry P. Davis Field (7.5 miles)

  • Lowest 9 December, 2025

    17.1 °F

  • Average December

    32.2 °F

  • Highest 10 December, 2025

    46 °F

Climate (2020–Present)

Manassas, Manassas Regional Airport/Harry P. Davis Field (7.5 miles)

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  • Average Low 2020–2025

    46 °F

  • Average 2020–2025

    57 °F

  • Average High 2020–2025

    67.9 °F
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