Deep Lake Weather Forecast

    • 37
    • 59

    Areas Smoke

    • 40
    • 58

    Mostly Sunny

    • 46
    • 64

    Slight Chance Rain Showers

    • 44
    • 62

    Chance Rain Showers

    • 43
    • 60

    Chance Rain Showers

    • 41
    • 57

    Chance Rain Showers

Today 4 Sep Gallatin and Madison County Mountains and Centennial Mountains

Partly cloudy. Areas of smoke. Highs 65 to 75. Northwest Winds 5 to 10 Mph shifting to the north 10 to 20 Mph in the afternoon.

Tonight 4 Sep Gallatin and Madison County Mountains and Centennial Mountains

Colder. Partly cloudy. Areas of smoke. Lows 35 to 45. North Winds 5 to 15 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Deep Lake Temperature Statistics

September Temperature

Ennis - Big Sky Airport (28 miles)

  • Lowest 1 September, 2025

    46.4 °F

  • Average September

    65.8 °F

  • Highest 1 September, 2025

    86 °F

Climate (2020–Present)

Ennis - Big Sky Airport (28 miles)

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  • Average Low 2020–2025

    31.3 °F

  • Average 2020–2025

    43.7 °F

  • Average High 2020–2025

    55.7 °F
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