Potomac River - Rosilie Island Weather Forecast

    • 61
    • 80

    Increasing Clouds

    • 45
    • 69

    Rain Showers

    • 44
    • 63

    Mostly Sunny

    • 52
    • 65

    Mostly Cloudy

    • 53
    • 66

    Mostly Cloudy

    • 51
    • 64

    Slight Chance Rain Showers

Today 7 Oct Arlington/Falls Church/Alexandria

Mostly sunny. Highs around 80. South Winds 5 to 10 Mph.

Tonight 7 Oct Arlington/Falls Church/Alexandria

Cloudy. A chance of Showers in the Evening, then Showers with a slight chance of Thunderstorms after midnight. Lows in the lower 60s. South Winds 5 to 10 Mph. Chance of rain 90 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Potomac River - Rosilie Island Temperature Statistics

October Temperature

Washington/Reagan National Airport, DC (3.7 miles)

  • Lowest 2 October, 2025

    55 °F

  • Average October

    64.6 °F

  • Highest 4 October, 2025

    78.1 °F

Climate (2020–Present)

Washington/Reagan National Airport, DC (3.7 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2020–2025

    52.7 °F

  • Average 2020–2025

    60.5 °F

  • Average High 2020–2025

    69.3 °F
Get WillyWeather+ to remove ads