Potomac River - Four Mile Run Entrance Weather Forecast

    • 59
    • 78

    Decreasing Clouds

    • 63
    • 81

    Mostly Sunny

    • 66
    • 86

    Chance Rain Showers

    • 68
    • 87

    Partly Sunny

    • 61
    • 84

    Chance Rain Showers

    • 57
    • 77

    Partly Sunny

Today 2 Sep Arlington/Falls Church/Alexandria

Mostly sunny. Highs in the upper 70s. East Winds around 5 Mph.

Tonight 2 Sep Arlington/Falls Church/Alexandria

Mostly clear. Lows in the upper 50s. Southeast Winds around 5 Mph in the Evening, becoming light and variable.

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Potomac River - Four Mile Run Entrance Temperature Statistics

September Temperature

Washington/Reagan National Airport, DC (0.6 miles)

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  • Average September

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Climate (2020–Present)

Washington/Reagan National Airport, DC (0.6 miles)

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  • Average Low 2020–2025

    52.7 °F

  • Average 2020–2025

    60.5 °F

  • Average High 2020–2025

    69.2 °F
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