Big Sky Resort Weather Forecast

    • 29
    • 37

    Partly Sunny

    • 28
    • 37

    Partly Sunny

    • 28
    • 41

    Mostly Sunny

    • 31
    • 38

    Mostly Cloudy

    • 25
    • 35

    Snow Likely

    • 17
    • 30

    Chance Snow

    • 23
    • 28

    Chance Snow

Today 12 Dec Gallatin and Madison County Mountains and Centennial Mountains

Partly sunny. Near steady temperature in the upper 30s. Southwest Winds 10 to 15 Mph with Gusts to around 40 Mph.

Tonight 12 Dec Gallatin and Madison County Mountains and Centennial Mountains

Colder. Partly cloudy. Lows 22 to 32. Southwest Winds 10 to 20 Mph with Gusts to around 50 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Big Sky Resort Temperature Statistics

December Temperature

Ennis - Big Sky Airport (11.8 miles)

  • Lowest 1 December, 2025

    5 °F

  • Average December

    34.8 °F

  • Highest 10 December, 2025

    55.4 °F

Climate (2020–Present)

Ennis - Big Sky Airport (11.8 miles)

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  • Average Low 2020–2025

    31.6 °F

  • Average 2020–2025

    43.9 °F

  • Average High 2020–2025

    55.8 °F
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