Fairfax Weather Forecast

    • 77
    • 90

    Thunderstorms Likely

    • 77
    • 90

    Thunderstorms Likely

    • 77
    • 89

    Rain Showers

    • 77
    • 90

    Chance Thunderstorms

    • 78
    • 90

    Chance Thunderstorms

    • 77
    • 86

    Chance Thunderstorms

Today 10 Sep South Central Duval

Mostly sunny. Showers and Thunderstorms likely this afternoon. Highs in the lower 90s. South Winds 5 to 10 Mph. Chance of rain 70 percent.

Tonight 10 Sep South Central Duval

Mostly cloudy with a chance of Showers and Thunderstorms in the Evening, then partly cloudy after midnight. Lows in the mid 70s. Southeast Winds 5 to 10 Mph, becoming southwest after midnight. Chance of rain 50 percent.

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Fairfax Temperature Statistics

September Temperature

Jacksonville Naval Air Station (3.7 miles)

  • Lowest 6 September, 2026

    73.9 °F

  • Average September

    81.7 °F

  • Highest 6 September, 2026

    91.9 °F

Climate (2021–2026)

Jacksonville Naval Air Station (3.7 miles)

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  • Average Low 2021–2026

    65 °F

  • Average 2021–2026

    72.7 °F

  • Average High 2021–2026

    81.3 °F
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