Cascade Weather Forecast

    • 51
    • 82

    Decreasing Clouds

    • 52
    • 84

    Partly Sunny

    • 52
    • 82

    Thunderstorms Likely

    • 50
    • 74

    Rain Showers Likely

    • 51
    • 75

    Rain Showers Likely

    • 50
    • 73

    Chance Rain Showers

    • 49
    • 73

    Chance Rain Showers

Today 8 Sep Cascade County below 5000ft

Haze in the morning. Partly cloudy with a 20 percent chance of Thunderstorms. Highs 80 to 85. West Winds 5 to 10 Mph.

Tonight 8 Sep Cascade County below 5000ft

Mostly clear. A 20 percent chance of Thunderstorms in the evening. Haze after midnight. Lows 50 to 55. Northwest Winds up to 10 Mph shifting to the south after midnight.

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Cascade Temperature Statistics

September Temperature

Great Falls, Great Falls International Airport (19.9 miles)

  • Lowest 5 September, 2025

    39.9 °F

  • Average September

    65.1 °F

  • Highest 1 September, 2025

    90 °F

Climate (2020–Present)

Great Falls, Great Falls International Airport (19.9 miles)

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  • Average Low 2020–2025

    34 °F

  • Average 2020–2025

    46.4 °F

  • Average High 2020–2025

    58.3 °F
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