Garrison Weather Forecast

    • 56
    • 88

    Chance Thunderstorms

    • 56
    • 89

    Rain Showers Likely

    • 55
    • 91

    Slight Chance Thunderstorms

    • 54
    • 90

    Mostly Sunny

    • 56
    • 87

    Mostly Cloudy

    • 55
    • 83

    Chance Thunderstorms

Today 16 Jul Butte/Blackfoot Region

Sunny in the Morning, then partly cloudy with a 30 percent chance of Showers and Thunderstorms in the afternoon. Highs in the 80s.

Tonight 16 Jul Butte/Blackfoot Region

Mostly cloudy with a 50 percent chance of Showers and Thunderstorms in the Evening, then mostly clear after midnight. Lows in the 50s.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Garrison Temperature Statistics

July Temperature

Helena Regional Airport (39.8 miles)

  • Lowest 2 July, 2026

    47.6 °F

  • Average July

    70.9 °F

  • Highest 11 July, 2026

    101.6 °F

Climate (2021–2026)

Helena Regional Airport (39.8 miles)

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  • Average Low 2021–2026

    36.4 °F

  • Average 2021–2026

    48 °F

  • Average High 2021–2026

    59.9 °F
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