McLean Weather Forecast

    • 61
    • 83

    Becoming Sunny

    • 65
    • 87

    Mostly Sunny

    • 72
    • 88

    Mostly Sunny

    • 68
    • 89

    Chance Thunderstorms

    • 65
    • 82

    Partly Sunny

    • 68
    • 83

    Chance Rain Showers

    • 67
    • 87

    Partly Sunny

Today 7 Sep Arlington/Falls Church/Alexandria

Sunny. Highs in the mid 80s. Northeast Winds around 5 Mph.

Tonight 7 Sep Arlington/Falls Church/Alexandria

Mostly clear. Lows in the lower 60s. East Winds around 5 Mph, becoming north after midnight.

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McLean Temperature Statistics

September Temperature

Washington/Reagan National Airport, DC (9.3 miles)

  • Lowest 3 September, 2026

    71.7 °F

  • Average September

    82.5 °F

  • Highest 1 September, 2026

    98.7 °F

Climate (2021–2026)

Washington/Reagan National Airport, DC (9.3 miles)

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  • Average Low 2021–2026

    52.4 °F

  • Average 2021–2026

    60.5 °F

  • Average High 2021–2026

    69.3 °F
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