Arrastra Mountain Weather Forecast

    • 36
    • 46

    Rain Showers Likely

    • 36
    • 45

    Mostly Cloudy

    • 35
    • 39

    Rain

    • 33
    • 41

    Slight Chance Rain

    • 35
    • 45

    Partly Sunny

    • 37
    • 48

    Mostly Sunny

Today 11 Sep Butte/Blackfoot Region

Rain Showers likely and a slight chance of Thunderstorms early in the Morning, then slight chance of Showers and Thunderstorms in the late morning and early afternoon. Chance of precipitation 60 percent. Cooler. Highs in the upper 50s to mid 60s.

Tonight 11 Sep Butte/Blackfoot Region

Mostly cloudy. Lows in the 30s to lower 40s.

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Arrastra Mountain Temperature Statistics

September Temperature

Helena Regional Airport (51 miles)

  • Lowest 3 September, 2026

    46.7 °F

  • Average September

    63.8 °F

  • Highest 1 September, 2026

    85.6 °F

Climate (2021–2026)

Helena Regional Airport (51 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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