City-Manassas Parks & Recreation Weather Forecast

    • 64
    • 84

    Rain Showers

    • 59
    • 75

    Rain Showers

    • 54
    • 67

    Rain Showers

    • 54
    • 64

    Rain Showers Likely

    • 51
    • 65

    Chance Rain Showers

    • 51
    • 67

    Partly Sunny

Today 20 Sep Northwest Prince William

Mostly cloudy with scattered Showers. A chance of Thunderstorms this afternoon. Highs in the lower 80s. Southwest Winds 5 to 10 Mph. Chance of rain 50 percent.

Tonight 20 Sep Northwest Prince William

Mostly cloudy. Numerous Showers with a chance of Thunderstorms in the Evening, then a slight chance of Showers and Thunderstorms after midnight. Patchy fog after midnight. Lows in the lower 60s. Northwest Winds around 5 Mph. Chance of rain 70 percent.

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City-Manassas Parks & Recreation Temperature Statistics

September Temperature

Manassas, Manassas Regional Airport/Harry P. Davis Field (4.3 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 (4.3 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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