Cannon Lake Weather Forecast

    • 27
    • 37

    Chance Snow

    • 30
    • 48

    Rain Likely

    • 28
    • 39

    Chance Snow

    • 27
    • 43

    Chance Snow

    • 24
    • 41

    Chance Snow

    • 25
    • 39

    Slight Chance Snow

Today 30 Mar Big Belt

Patchy fog in the morning. Mostly cloudy with a 50 percent chance of snow. Highs 30 to 40. East Winds 5 to 15 Mph.

Tonight 30 Mar Big Belt

Mostly cloudy. A 20 percent chance of snow in the evening. Lows 25 to 30. Southeast Winds 5 to 15 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Cannon Lake Temperature Statistics

March Temperature

Helena Regional Airport (31.1 miles)

  • Lowest 7 March, 2025

    21.8 °F

  • Average March

    42.5 °F

  • Highest 26 March, 2025

    72 °F

Climate (2020–Present)

Helena Regional Airport (31.1 miles)

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  • Average Low 2020–2025

    36 °F

  • Average 2020–2025

    47.4 °F

  • Average High 2020–2025

    59.1 °F
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