Haymarket Weather Forecast

    • 71
    • 91

    Chance Thunderstorms

    • 64
    • 84

    Chance Thunderstorms

    • 60
    • 82

    Mostly Sunny

    • 59
    • 81

    Mostly Sunny

    • 62
    • 85

    Partly Sunny

    • 69
    • 87

    Partly Sunny

Today 4 Sep Northwest Prince William

Sunny in the Morning, then partly sunny with a chance of Showers and Thunderstorms in the afternoon. Hot with Highs in the lower 90s. Northwest Winds 5 to 10 Mph. Chance of rain 50 percent.

Tonight 4 Sep Northwest Prince William

Mostly cloudy. A chance of Showers and Thunderstorms in the evening. Lows in the lower 70s. Northwest Winds 5 to 10 Mph. Chance of rain 50 percent.

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Haymarket Temperature Statistics

September Temperature

Manassas, Manassas Regional Airport/Harry P. Davis Field (8.7 miles)

  • Lowest 1 September, 2026

    72 °F

  • Average September

    82.8 °F

  • Highest 1 September, 2026

    96.1 °F

Climate (2021–2026)

Manassas, Manassas Regional Airport/Harry P. Davis Field (8.7 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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