Garrison Weather Forecast

    • 32
    • 59

    Decreasing Clouds

    • 39
    • 74

    Mostly Sunny

    • 37
    • 71

    Mostly Sunny

    • 42
    • 77

    Mostly Sunny

    • 47
    • 83

    Slight Chance Rain

    • 43
    • 78

    Chance Rain

Today 6 May Butte/Blackfoot Region

Partly cloudy. Highs in the 50s. East Winds to 15 Mph.

Tonight 6 May Butte/Blackfoot Region

Mostly clear. Lows in the 30s.

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Garrison Temperature Statistics

May Temperature

Helena Regional Airport (39.8 miles)

  • Lowest 1 May, 2025

    36.6 °F

  • Average May

    57.9 °F

  • Highest 3 May, 2025

    82 °F

Climate (2020–Present)

Helena Regional Airport (39.8 miles)

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  • Average Low 2020–2025

    36.1 °F

  • Average 2020–2025

    47.4 °F

  • Average High 2020–2025

    59.2 °F
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