Great Falls Park Weather Forecast

    • 61
    • 81

    Becoming Sunny

    • 64
    • 86

    Increasing Clouds

    • 68
    • 86

    Mostly Cloudy

    • 68
    • 83

    Chance Rain Showers

    • 66
    • 81

    Chance Rain Showers

    • 67
    • 82

    Slight Chance Rain Showers

    • 69
    • 82

    Slight Chance Thunderstorms

Today 3 Aug Central and Southeast Montgomery

Mostly sunny. Highs in the lower 80s. Northeast Winds around 5 Mph.

Tonight 3 Aug Central and Southeast Montgomery

Partly cloudy this Evening, then clearing. Lows in the lower 60s. East Winds around 5 Mph this Evening, becoming light and variable.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Great Falls Park Temperature Statistics

August Temperature

Washington/Dulles International Airport, DC (11.2 miles)

  • Lowest 1 August, 2025

    66 °F

  • Average August

    69.9 °F

  • Highest 1 August, 2025

    73.9 °F

Climate (2020–Present)

Washington/Dulles International Airport, DC (11.2 miles)

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  • Average Low 2020–2025

    47.9 °F

  • Average 2020–2025

    58.3 °F

  • Average High 2020–2025

    68.5 °F
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