Great Falls Weather Forecast

    • 72
    • 88

    Rain Showers

    • 69
    • 84

    Rain Showers

    • 70
    • 82

    Chance Rain Showers

    • 70
    • 85

    Rain Showers Likely

    • 70
    • 88

    Chance Thunderstorms

    • 68
    • 84

    Chance Thunderstorms

    • 67
    • 84

    Chance Rain Showers

Today 6 Jul Central and Southeast Montgomery

Partly sunny with scattered Showers and Thunderstorms. Some Thunderstorms may produce frequent lightning and heavy rainfall. Highs in the upper 80s. Northeast Winds around 5 Mph. Chance of rain 50 percent.

Tonight 6 Jul Central and Southeast Montgomery

Mostly cloudy. Numerous Showers and Thunderstorms this Evening, then scattered Showers with isolated Thunderstorms after midnight. Patchy fog. Some Thunderstorms may produce frequent lightning and heavy rainfall this evening. Some Thunderstorms may produce frequent lightning and heavy rainfall after midnight. Lows in the lower 70s. Northeast Winds around 5 Mph. Chance of rain 70 percent.

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Great Falls Temperature Statistics

July Temperature

Washington/Dulles International Airport, DC (9.3 miles)

  • Lowest 1 July, 2026

    73.7 °F

  • Average July

    87.2 °F

  • Highest 4 July, 2026

    99 °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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