Deep Lake Weather Forecast

    • 33
    • 46

    Mostly Sunny

    • 35
    • 49

    Partly Sunny

    • 24
    • 43

    Snow

    • 20
    • 30

    Snow Likely

    • 16
    • 28

    Chance Snow

    • 19
    • 28

    Partly Sunny

Today 23 Oct Gallatin and Madison County Mountains and Centennial Mountains

Sunny. Highs 45 to 55. West Winds up to 10 Mph.

Tonight 23 Oct Gallatin and Madison County Mountains and Centennial Mountains

Mostly clear. Lows 25 to 35. Southwest Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Deep Lake Temperature Statistics

October Temperature

Ennis - Big Sky Airport (28 miles)

  • Lowest 6 October, 2025

    23 °F

  • Average October

    45.1 °F

  • Highest 10 October, 2025

    71.6 °F

Climate (2020–Present)

Ennis - Big Sky Airport (28 miles)

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  • Average Low 2020–2025

    31.4 °F

  • Average 2020–2025

    43.7 °F

  • Average High 2020–2025

    55.6 °F
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