Great Falls Park Weather Forecast

    • 64
    • 80

    Rain Showers

    • 55
    • 77

    Mostly Sunny

    • 58
    • 77

    Mostly Sunny

    • 52
    • 76

    Mostly Sunny

    • 54
    • 72

    Mostly Sunny

    • 54
    • 73

    Partly Sunny

Today 27 May Central and Southeast Montgomery

Mostly cloudy. A chance of Showers with a slight chance of Thunderstorms late this Morning, then Showers likely with a chance of Thunderstorms this afternoon. Highs around 80. West Winds around 5 Mph. Chance of rain 70 percent.

Tonight 27 May Central and Southeast Montgomery

Mostly cloudy. A chance of Showers and Thunderstorms in the Evening, then a slight chance of Showers after midnight. Lows in the lower 60s. Northwest Winds around 5 Mph. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Great Falls Park Temperature Statistics

May Temperature

Washington/Dulles International Airport, DC (11.2 miles)

  • Lowest 8 May, 2026

    37.7 °F

  • Average May

    62.9 °F

  • Highest 19 May, 2026

    96.7 °F

Climate (2021–Present)

Washington/Dulles International Airport, DC (11.2 miles)

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  • Average Low 2021–2026

    47.6 °F

  • Average 2021–2026

    58.2 °F

  • Average High 2021–2026

    68.5 °F
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