Great Falls Weather Forecast

    • 36
    • 62

    Becoming Sunny

    • 36
    • 60

    Mostly Sunny

    • 36
    • 59

    Partly Sunny

    • 40
    • 58

    Mostly Cloudy

    • 39
    • 54

    Slight Chance Rain Showers

    • 41
    • 54

    Chance Rain Showers

Today 23 Oct Central and Southeast Montgomery

Sunny. Highs in the lower 60s. West Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 23 Oct Central and Southeast Montgomery

Clear. Lows in the upper 30s. West Winds 5 to 10 Mph.

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Great Falls Temperature Statistics

October Temperature

Washington/Dulles International Airport, DC (9.3 miles)

  • Lowest 17 October, 2025

    34 °F

  • Average October

    60.6 °F

  • Highest 6 October, 2025

    82.9 °F

Climate (2020–Present)

Washington/Dulles International Airport, DC (9.3 miles)

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  • Average Low 2020–2025

    47.8 °F

  • Average 2020–2025

    58.3 °F

  • Average High 2020–2025

    68.6 °F
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