Potomac River - Rosilie Island Weather Forecast

    • 32
    • 48

    Rain

    • 43
    • 53

    Partly Sunny

    • 41
    • 58

    Mostly Cloudy

    • 53
    • 60

    Rain

    • 30
    • 69

    Rain

    • 26
    • 41

    Partly Sunny

Today 12 Mar Arlington/Falls Church/Alexandria

Showers in the Morning, then Showers likely with a chance of snow Showers in the afternoon. Much cooler with Highs in the upper 40s. Northwest Winds 15 to 20 Mph. Gusts up to 40 Mph, decreasing to 30 Mph in the afternoon. Chance of precipitation 90 percent.

Tonight 12 Mar Arlington/Falls Church/Alexandria

Mostly clear. Lows in the lower 30s. West Winds 5 to 10 Mph. Gusts up to 25 Mph in the evening.

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Potomac River - Rosilie Island Temperature Statistics

March Temperature

Washington/Reagan National Airport, DC (3.7 miles)

  • Lowest 2 March, 2026

    31.6 °F

  • Average March

    49.5 °F

  • Highest 9 March, 2026

    75.9 °F

Climate (2021–Present)

Washington/Reagan National Airport, DC (3.7 miles)

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  • Average Low 2021–2026

    52.4 °F

  • Average 2021–2026

    60.3 °F

  • Average High 2021–2026

    69.1 °F
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