Potomac River - Bellevue Weather Forecast

    • 62
    • 89

    Rain Showers

    • 56
    • 75

    Chance Rain Showers

    • 55
    • 75

    Mostly Sunny

    • 59
    • 74

    Mostly Cloudy

    • 59
    • 75

    Partly Sunny

    • 61
    • 82

    Mostly Sunny

    • 57
    • 76

    Mostly Sunny

Today 6 Sep District of Columbia

Showers and scattered Thunderstorms. Highs in the upper 80s. Northwest Winds around 10 Mph. Chance of rain 80 percent.

Tonight 6 Sep District of Columbia

A chance of Thunderstorms this evening. Showers likely. Lows in the lower 60s. North Winds around 5 Mph. Chance of rain 70 percent.

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Potomac River - Bellevue Temperature Statistics

September Temperature

Washington/Reagan National Airport, DC (1.2 miles)

  • Lowest 1 September, 2025

    59 °F

  • Average September

    71.1 °F

  • Highest 4 September, 2025

    87.1 °F

Climate (2020–Present)

Washington/Reagan National Airport, DC (1.2 miles)

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  • Average Low 2020–2025

    52.6 °F

  • Average 2020–2025

    60.4 °F

  • Average High 2020–2025

    69.2 °F
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