Fort Marcy Park Weather Forecast

    • 56
    • 81

    Becoming Sunny

    • 58
    • 82

    Mostly Sunny

    • 63
    • 86

    Mostly Sunny

    • 66
    • 87

    Partly Sunny

    • 65
    • 86

    Slight Chance Thunderstorms

    • 66
    • 83

    Partly Sunny

Today 14 Sep Arlington/Falls Church/Alexandria

Sunny. Highs in the lower 80s. North Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 14 Sep Arlington/Falls Church/Alexandria

Clear. Lows in the upper 50s. North Winds 5 to 10 Mph.

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Fort Marcy Park Temperature Statistics

September Temperature

Washington/Reagan National Airport, DC (7.5 miles)

  • Lowest 7 September, 2026

    64.7 °F

  • Average September

    80 °F

  • Highest 1 September, 2026

    98.7 °F

Climate (2021–2026)

Washington/Reagan National Airport, DC (7.5 miles)

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  • Average Low 2021–2026

    52.4 °F

  • Average 2021–2026

    60.5 °F

  • Average High 2021–2026

    69.4 °F
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