Potomac River - Fort Washington Light Weather Forecast

    • 65
    • 85

    Mostly Sunny

    • 71
    • 88

    Chance Rain Showers

    • 64
    • 85

    Partly Sunny

    • 65
    • 81

    Mostly Cloudy

    • 67
    • 84

    Chance Rain Showers

    • 66
    • 81

    Chance Rain Showers

    • 64
    • 79

    Chance Rain Showers

Today 16 Sep Prince Georges

Mostly cloudy with a 40 percent chance of Showers. Highs in the mid 70s.

Tonight 16 Sep Prince Georges

Partly cloudy. Lows in the mid 60s. South Winds around 5 Mph.

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Potomac River - Fort Washington Light Temperature Statistics

September Temperature

Fort Belvoir (7.5 miles)

  • Lowest 8 September, 2026

    58.8 °F

  • Average September

    76.5 °F

  • Highest 1 September, 2026

    96.4 °F

Climate (2021–2026)

Fort Belvoir (7.5 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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