Lake Manassas Weather Forecast

    • 55
    • 62

    Rain

    • 51
    • 62

    Rain

    • 48
    • 64

    Mostly Cloudy

    • 51
    • 68

    Partly Sunny

    • 53
    • 70

    Partly Sunny

    • 53
    • 70

    Partly Sunny

    • 53
    • 72

    Partly Sunny

Today 22 Sep Southern Fauquier

Mostly sunny. Highs in the mid 70s.

Tonight 22 Sep Southern Fauquier

Rain with patchy drizzle. Patchy fog. Lows in the mid 50s. Northeast Winds 5 to 10 Mph with Gusts up to 25 Mph. Chance of rain near 100 percent.

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  • Temperature Forecast NOAA

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Lake Manassas Temperature Statistics

September Temperature

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

  • Lowest 15 September, 2026

    50 °F

  • Average September

    74.6 °F

  • Highest 1 September, 2026

    96.1 °F

Climate (2021–2026)

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

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  • Average Low 2021–2026

    46 °F

  • Average 2021–2026

    57.1 °F

  • Average High 2021–2026

    68.1 °F
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