Fairfax Weather Forecast

    • 71
    • 90

    Severe Tstms

    • 73
    • 90

    Rain Showers Likely

    • 72
    • 89

    Partly Sunny

    • 74
    • 91

    Partly Sunny

    • 73
    • 92

    Chance Rain Showers

    • 71
    • 88

    Chance Thunderstorms

Today 7 Aug Arlington/Falls Church/Alexandria

Mostly sunny. Numerous Showers and Thunderstorms this afternoon. Some Thunderstorms may produce damaging Winds and large hail this afternoon. Highs in the lower 90s. Southwest Winds 5 to 10 Mph. Chance of rain 70 percent.

Tonight 7 Aug Arlington/Falls Church/Alexandria

Mostly cloudy with numerous Showers and Thunderstorms in the Evening, then partly cloudy after midnight. Some Thunderstorms may produce damaging Winds and large hail in the evening. Lows in the lower 70s. Southwest Winds 5 to 10 Mph. Chance of rain 70 percent.

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Fairfax Temperature Statistics

August Temperature

Washington/Dulles International Airport, DC (9.3 miles)

  • Lowest 1 August, 2026

    65.6 °F

  • Average August

    79 °F

  • Highest 3 August, 2026

    89.7 °F

Climate (2021–2026)

Washington/Dulles International Airport, DC (9.3 miles)

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  • Average Low 2021–2026

    47.6 °F

  • Average 2021–2026

    58.3 °F

  • Average High 2021–2026

    68.6 °F
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