Manassas Weather Forecast

    • 71
    • 88

    Becoming Sunny

    • 67
    • 89

    Rain Showers Likely

    • 63
    • 83

    Partly Sunny

    • 67
    • 83

    Chance Rain Showers

    • 66
    • 87

    Slight Chance Thunderstorms

    • 66
    • 87

    Slight Chance Thunderstorms

Today 9 Sep Northwest Prince William

Mostly sunny. Highs in the upper 80s. Southwest Winds 5 to 10 Mph.

Tonight 9 Sep Northwest Prince William

Partly cloudy. Lows in the lower 60s. Southwest Winds 5 to 10 Mph.

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Manassas Temperature Statistics

September Temperature

Manassas, Manassas Regional Airport/Harry P. Davis Field (3.1 miles)

  • Lowest 6 September, 2026

    64 °F

  • Average September

    77.5 °F

  • Highest 1 September, 2026

    96.1 °F

Climate (2021–2026)

Manassas, Manassas Regional Airport/Harry P. Davis Field (3.1 miles)

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  • Average Low 2021–2026

    45.9 °F

  • Average 2021–2026

    57.1 °F

  • Average High 2021–2026

    68.1 °F
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