Garrison Weather Forecast

    • 33
    • 65

    Partly Sunny

    • 36
    • 69

    Mostly Sunny

    • 36
    • 69

    Rain

    • 24
    • 49

    Rain

    • 24
    • 50

    Partly Sunny

    • 23
    • 49

    Partly Sunny

    • 24
    • 52

    Partly Sunny

Today 20 Oct Butte/Blackfoot Region

Partly cloudy. A 20 percent chance of snow in the morning. Highs in the mid 40s to lower 50s.

Tonight 20 Oct Butte/Blackfoot Region

Mostly clear. Lows in the 30s.

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Garrison Temperature Statistics

October Temperature

Helena Regional Airport (39.8 miles)

  • Lowest 13 October, 2026

    25.6 °F

  • Average October

    50.8 °F

  • Highest 9 October, 2026

    82.7 °F

Climate (2021–2026)

Helena Regional Airport (39.8 miles)

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  • Average Low 2021–2026

    36.3 °F

  • Average 2021–2026

    47.9 °F

  • Average High 2021–2026

    59.9 °F
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