Canyon Ferry State Park Weather Forecast

    • 52
    • 64

    Rain Likely

    • 52
    • 65

    Chance Rain

    • 52
    • 70

    Mostly Sunny

    • 51
    • 73

    Mostly Sunny

    • 52
    • 71

    Partly Sunny

    • 52
    • 70

    Partly Sunny

Today 15 Sep Canyon Ferry Area

Cooler. Mostly cloudy with a 50 percent chance of rain Showers. Highs 65 to 70. Northwest Winds up to 10 Mph.

Tonight 15 Sep Canyon Ferry Area

Mostly cloudy. Chance of Thunderstorms in the Evening, then chance of rain Showers after midnight. Lows 45 to 50. Northwest Winds up to 10 Mph. Chance of precipitation 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Canyon Ferry State Park Temperature Statistics

September Temperature

Helena Regional Airport (21.1 miles)

  • Lowest 5 September, 2025

    46 °F

  • Average September

    66.4 °F

  • Highest 3 September, 2025

    91.9 °F

Climate (2020–Present)

Helena Regional Airport (21.1 miles)

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  • Average Low 2020–2025

    36.1 °F

  • Average 2020–2025

    47.5 °F

  • Average High 2020–2025

    59.4 °F
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