Gainesville Weather Forecast

    • 47
    • 55

    Rain

    • 25
    • 56

    Rain Likely

    • 35
    • 47

    Partly Sunny

    • 23
    • 50

    Mostly Sunny

    • 27
    • 41

    Mostly Cloudy

    • 36
    • 47

    Mostly Cloudy

    • 37
    • 52

    Mostly Cloudy

Today 18 Dec Northwest Prince William

Cloudy with a 20 percent chance of rain. Highs in the mid 50s. Southeast Winds 5 to 10 Mph.

Tonight 18 Dec Northwest Prince William

Rain. Lows in the upper 40s. Temperature rising into the upper 50s. South Winds 15 to 20 Mph with Gusts up to 30 Mph. Chance of rain near 100 percent.

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Gainesville Temperature Statistics

December Temperature

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

  • Lowest 16 December, 2025

    12.9 °F

  • Average December

    31.3 °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

    45.9 °F

  • Average 2020–2025

    57 °F

  • Average High 2020–2025

    67.9 °F
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