Potomac River - Fort Washington Light Weather Forecast

    • 69
    • 89

    Rain Showers

    • 67
    • 83

    Chance Rain Showers

    • 70
    • 84

    Rain Showers Likely

    • 69
    • 86

    Chance Thunderstorms

    • 66
    • 85

    Partly Sunny

    • 70
    • 87

    Mostly Sunny

Today 10 Sep Prince Georges

Partly sunny. A slight chance of Showers this morning. Highs in the upper 80s. West Winds 5 to 10 Mph. Chance of rain 20 percent.

Tonight 10 Sep Prince Georges

Mostly cloudy. A chance of Showers and Thunderstorms in the Evening, then Showers with a chance of Thunderstorms after midnight. Lows in the upper 60s. West Winds around 5 Mph, becoming north after midnight. Chance of rain 90 percent.

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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

    58.1 °F

  • Average High 2021–2026

    68.4 °F
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