Great Falls Weather Forecast

    • 71
    • 86

    Increasing Clouds

    • 73
    • 85

    Rain Showers Likely

    • 74
    • 90

    Slight Chance Thunderstorms

    • 72
    • 89

    Chance Thunderstorms

    • 72
    • 88

    Rain Showers Likely

    • 72
    • 88

    Chance Thunderstorms

Today 4 Aug Central and Southeast Montgomery

Partly sunny. Highs in the mid 80s. Northeast Winds around 5 Mph.

Tonight 4 Aug Central and Southeast Montgomery

Mostly cloudy. Lows in the mid 60s. Northeast Winds around 5 Mph.

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  • Temperature Real-Time

Great Falls Temperature Statistics

August Temperature

Washington/Dulles International Airport, DC (9.3 miles)

  • Lowest 1 August, 2026

    66 °F

  • Average August

    77.5 °F

  • Highest 1 August, 2026

    86 °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

    58.2 °F

  • Average High 2021–2026

    68.6 °F
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