Potomac River - Rosilie Island Weather Forecast

    • 49
    • 69

    Mostly Cloudy

    • 51
    • 72

    Mostly Sunny

    • 48
    • 75

    Partly Sunny

    • 48
    • 66

    Mostly Cloudy

    • 53
    • 70

    Chance Rain Showers

    • 54
    • 69

    Slight Chance Rain Showers

Today 28 Oct Arlington/Falls Church/Alexandria

Patchy fog this morning. Partly sunny. Highs in the upper 60s. Northeast Winds around 5 Mph, becoming southeast around 5 Mph this afternoon.

Tonight 28 Oct Arlington/Falls Church/Alexandria

Mostly cloudy in the Evening, then becoming partly cloudy. Patchy fog after midnight. Lows around 50. Southeast Winds around 5 Mph in the Evening, becoming light and variable.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Potomac River - Rosilie Island Temperature Statistics

October Temperature

Washington/Reagan National Airport, DC (3.7 miles)

  • Lowest 19 October, 2026

    42.7 °F

  • Average October

    63.7 °F

  • Highest 14 October, 2026

    90.6 °F

Climate (2021–2026)

Washington/Reagan National Airport, DC (3.7 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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