Old Baldy Mountain Weather Forecast

    • 37
    • 48

    Chance Rain

    • 38
    • 52

    Partly Sunny

    • 43
    • 62

    Sunny

    • 44
    • 65

    Partly Sunny

    • 38
    • 56

    Chance Rain

    • 35
    • 47

    Chance Rain

Today 7 Sep Butte/Blackfoot Region

Rain Showers likely and a slight chance of Thunderstorms early in the Morning, then Areas of rain in the late morning and early afternoon. Slight chance of Thunderstorms early in the afternoon. Patchy fog early in the morning. Chance of precipitation 70 percent. Cooler. Highs in the 50s to lower 60s. West Winds 15 to 25 Mph with Gusts to around 35 Mph.

Tonight 7 Sep Butte/Blackfoot Region

Mostly clear. Lows in the 30s. Southwest Winds to 15 Mph. Gusts up to 35 Mph in the evening.

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Old Baldy Mountain Temperature Statistics

September Temperature

Helena Regional Airport (42.3 miles)

  • Lowest 3 September, 2026

    46.7 °F

  • Average September

    64.8 °F

  • Highest 1 September, 2026

    85.6 °F

Climate (2021–2026)

Helena Regional Airport (42.3 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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