Cannon Lake Weather Forecast

    • 38
    • 59

    Mostly Sunny

    • 49
    • 68

    Chance Rain

    • 51
    • 66

    Slight Chance Rain

    • 43
    • 63

    Rain Likely

    • 48
    • 61

    Breezy

    • 49
    • 71

    Mostly Sunny

    • 52
    • 78

    Partly Sunny

Today 31 May Big Belt

Sunny. Highs 50 to 60. West Winds 5 to 15 Mph. Gusts up to 30 Mph in the afternoon.

Tonight 31 May Big Belt

Mostly clear. Lows 35 to 40. Northwest Winds 5 to 15 Mph with Gusts to around 30 Mph shifting to the south after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Cannon Lake Temperature Statistics

May Temperature

Helena Regional Airport (31.1 miles)

  • Lowest 4 May, 2024

    29.8 °F

  • Average May

    53.5 °F

  • Highest 28 May, 2024

    85.6 °F

Climate (2019–Present)

Helena Regional Airport (31.1 miles)

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  • Average Low 2019–2024

    35.9 °F

  • Average 2019–2024

    46.9 °F

  • Average High 2019–2024

    58.5 °F
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