Great Falls Weather Forecast

    • 56
    • 87

    Increasing Clouds

    • 48
    • 83

    Chance Rain Showers

    • 48
    • 75

    Breezy

    • 47
    • 77

    Chance Rain Showers

    • 47
    • 75

    Chance Rain Showers

    • 49
    • 75

    Chance Rain Showers

Today 1 Sep Cascade County below 5000ft

Mostly sunny. Highs in the mid 80s. South Winds up to 10 Mph.

Tonight 1 Sep Cascade County below 5000ft

Partly cloudy with a 20 percent chance of rain Showers in the Evening, then mostly cloudy after midnight. Lows in the mid 50s. South Winds 5 to 15 Mph with Gusts to around 35 Mph.

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Great Falls Temperature Statistics

September Temperature

Great Falls, Great Falls International Airport (3.7 miles)

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Climate (2021–2026)

Great Falls, Great Falls International Airport (3.7 miles)

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  • Average Low 2021–2026

    34.3 °F

  • Average 2021–2026

    46.9 °F

  • Average High 2021–2026

    59.1 °F
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