Cannon Lake Weather Forecast

    • 49
    • 67

    Chance Thunderstorms

    • 51
    • 70

    Partly Sunny

    • 50
    • 71

    Chance Rain Showers

    • 53
    • 75

    Mostly Sunny

    • 56
    • 79

    Mostly Sunny

    • 56
    • 79

    Slight Chance Thunderstorms

Today 1 Jul Big Belt

Sunny until late afternoon then becoming mostly cloudy. Slight chance of Thunderstorms early in the afternoon. Chance of Thunderstorms late in the afternoon. Highs 61 to 69. Southwest Winds up to 10 Mph with Gusts to around 25 Mph. Chance of Thunderstorms 50 percent.

Tonight 1 Jul Big Belt

Mostly cloudy. A 50 percent chance of Thunderstorms in the evening. Lows in the mid 40s. Southwest Winds up to 10 Mph.

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Cannon Lake Temperature Statistics

July Temperature

Helena Regional Airport (31.1 miles)

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  • Average July

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Climate (2021–2026)

Helena Regional Airport (31.1 miles)

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  • Average Low 2021–2026

    36.5 °F

  • Average 2021–2026

    48 °F

  • Average High 2021–2026

    60 °F
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