Big Sky Weather Forecast

    • 42
    • 62

    Rain Showers

    • 47
    • 68

    Mostly Sunny

    • 52
    • 73

    Mostly Sunny

    • 52
    • 78

    Mostly Sunny

    • 50
    • 78

    Partly Sunny

    • 46
    • 71

    Slight Chance Thunderstorms

Today 5 Jul Gallatin and Madison County Mountains and Centennial Mountains

Partly cloudy with slight chance of rain Showers in the Morning, then mostly cloudy with chance of Thunderstorms in the afternoon. Highs 60 to 70. Southwest Winds 5 to 15 Mph. Gusts up to 30 Mph in the afternoon. Chance of precipitation 50 percent.

Tonight 5 Jul Gallatin and Madison County Mountains and Centennial Mountains

Mostly clear. A 20 percent chance of Thunderstorms in the evening. Lows 40 to 45. Northwest Winds up to 10 Mph.

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Big Sky Temperature Statistics

July Temperature

Ennis - Big Sky Airport (13.7 miles)

  • Lowest 1 July, 2025

    51.8 °F

  • Average July

    69.5 °F

  • Highest 1 July, 2025

    89.6 °F

Climate (2020–Present)

Ennis - Big Sky Airport (13.7 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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