Franconia Weather Forecast

    • 53
    • 64

    Mostly Cloudy

    • 51
    • 65

    Mostly Cloudy

    • 55
    • 70

    Mostly Sunny

    • 57
    • 75

    Partly Sunny

    • 57
    • 73

    Partly Sunny

    • 56
    • 75

    Partly Sunny

    • 58
    • 76

    Mostly Sunny

Today 23 Sep Arlington/Falls Church/Alexandria

Cloudy. Highs in the lower 60s. Northeast Winds around 10 Mph with Gusts up to 25 Mph.

Tonight 23 Sep Arlington/Falls Church/Alexandria

Mostly cloudy. Lows in the lower 50s. Northeast Winds 10 to 15 Mph.

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Franconia Temperature Statistics

September Temperature

Fort Belvoir (4.3 miles)

  • Lowest 15 September, 2026

    53.8 °F

  • Average September

    75.3 °F

  • Highest 1 September, 2026

    96.4 °F

Climate (2021–2026)

Fort Belvoir (4.3 miles)

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  • Average Low 2021–2026

    47.8 °F

  • Average 2021–2026

    58.2 °F

  • Average High 2021–2026

    68.4 °F
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