Great Falls Weather Forecast

    • 64
    • 80

    Sunny

    • 62
    • 85

    Chance Rain Showers

    • 58
    • 67

    Chance Rain Showers

    • 45
    • 77

    Chance Rain Showers

    • 37
    • 55

    Mostly Sunny

    • 40
    • 58

    Mostly Sunny

Today 13 Oct Central and Southeast Montgomery

Sunny. Highs around 80. South Winds 5 to 10 Mph.

Tonight 13 Oct Central and Southeast Montgomery

Clear. Lows in the mid 60s. Southwest Winds 5 to 10 Mph.

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Great Falls Temperature Statistics

October Temperature

Washington/Dulles International Airport, DC (9.3 miles)

  • Lowest 7 October, 2026

    42.7 °F

  • Average October

    63.9 °F

  • Highest 2 October, 2026

    89.7 °F

Climate (2021–2026)

Washington/Dulles International Airport, DC (9.3 miles)

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  • Average Low 2021–2026

    47.6 °F

  • Average 2021–2026

    58.3 °F

  • Average High 2021–2026

    68.6 °F
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