Sun River Weather Forecast

    • 42
    • 73

    Mostly Sunny

    • 48
    • 78

    Mostly Cloudy

    • 41
    • 79

    Breezy

    • 27
    • 53

    Snow

    • 25
    • 37

    Snow Likely

    • 28
    • 46

    Partly Sunny

Today 7 Oct Cascade County below 5000ft

Mostly sunny. Highs in the lower 70s. Northeast Winds up to 5 Mph.

Tonight 7 Oct Cascade County below 5000ft

Partly cloudy. Lows 42 to 48. East Winds up to 5 Mph shifting to the southwest after midnight.

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Sun River Temperature Statistics

October Temperature

Great Falls, Great Falls International Airport (16.2 miles)

  • Lowest 1 October, 2026

    33.7 °F

  • Average October

    57.7 °F

  • Highest 5 October, 2026

    84 °F

Climate (2021–2026)

Great Falls, Great Falls International Airport (16.2 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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