Potomac River - Marbury Point Weather Forecast

    • 61
    • 80

    Mostly Sunny

    • 67
    • 86

    Mostly Sunny

    • 72
    • 88

    Chance Rain Showers

    • 68
    • 85

    Partly Sunny

    • 69
    • 82

    Mostly Cloudy

    • 69
    • 87

    Chance Rain Showers

Today 15 Sep District of Columbia

Sunny. Highs around 80. Southeast Winds around 5 Mph.

Tonight 15 Sep District of Columbia

Mostly clear. Lows around 60. South Winds around 5 Mph.

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Potomac River - Marbury Point Temperature Statistics

September Temperature

Washington/Reagan National Airport, DC (1.9 miles)

  • Lowest 7 September, 2026

    64.7 °F

  • Average September

    79.7 °F

  • Highest 1 September, 2026

    98.7 °F

Climate (2021–2026)

Washington/Reagan National Airport, DC (1.9 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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