Potomac River - Rosilie Island Weather Forecast

    • 69
    • 87

    Partly Sunny

    • 70
    • 90

    Mostly Sunny

    • 71
    • 91

    Chance Rain Showers

    • 71
    • 86

    Rain Showers Likely

    • 71
    • 85

    Chance Thunderstorms

    • 70
    • 87

    Slight Chance Thunderstorms

Today 30 Jul Arlington/Falls Church/Alexandria

Mostly sunny. Highs in the mid 80s. Northwest Winds around 10 Mph with Gusts up to 20 Mph.

Tonight 30 Jul Arlington/Falls Church/Alexandria

Partly cloudy in the Evening, then clearing. Lows in the upper 60s. Northwest Winds 5 to 10 Mph.

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  • Temperature Real-Time

Potomac River - Rosilie Island Temperature Statistics

July Temperature

Washington/Reagan National Airport, DC (3.7 miles)

  • Lowest 24 July, 2026

    66.7 °F

  • Average July

    82.7 °F

  • Highest 4 July, 2026

    103.6 °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

    60.4 °F

  • Average High 2021–2026

    69.3 °F
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