Garrison Weather Forecast

    • 47
    • 84

    Slight Chance Thunderstorms

    • 40
    • 74

    Rain Showers Likely

    • 42
    • 68

    Slight Chance Thunderstorms

    • 43
    • 74

    Partly Sunny

    • 47
    • 81

    Mostly Sunny

    • 49
    • 85

    Mostly Sunny

Today 6 Aug Butte/Blackfoot Region

Mostly sunny in the morning then becoming mostly cloudy. Highs in the mid 70s to lower 80s. West Winds to 15 Mph in the afternoon.

Tonight 6 Aug Butte/Blackfoot Region

Mostly cloudy with a 20 percent chance of Showers and Thunderstorms in the Evening, then partly cloudy after midnight. Lows in the 40s to lower 50s. Northwest Winds to 15 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Garrison Temperature Statistics

August Temperature

Helena Regional Airport (39.8 miles)

  • Lowest 3 August, 2025

    55 °F

  • Average August

    69.6 °F

  • Highest 3 August, 2025

    86 °F

Climate (2020–Present)

Helena Regional Airport (39.8 miles)

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  • Average Low 2020–2025

    36 °F

  • Average 2020–2025

    47.5 °F

  • Average High 2020–2025

    59.4 °F
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