Cascade Weather Forecast

    • 41
    • 68

    Mostly Cloudy

    • 43
    • 65

    Mostly Cloudy

    • 43
    • 75

    Partly Sunny

    • 42
    • 69

    Mostly Sunny

    • 50
    • 76

    Mostly Sunny

    • 53
    • 82

    Partly Sunny

Today 30 Sep Cascade County below 5000ft

Breezy. Mostly sunny in the morning then becoming partly sunny. Highs in the mid 60s. Southwest Winds 15 to 25 Mph shifting to the northwest 10 to 15 Mph in the afternoon.

Tonight 30 Sep Cascade County below 5000ft

Colder. Mostly cloudy. Lows in the lower 40s. Northeast Winds up to 10 Mph.

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Cascade Temperature Statistics

September Temperature

Great Falls, Great Falls International Airport (19.9 miles)

  • Lowest 27 September, 2026

    28.7 °F

  • Average September

    59.5 °F

  • Highest 25 September, 2026

    88.6 °F

Climate (2021–2026)

Great Falls, Great Falls International Airport (19.9 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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