Big Sky Weather Forecast

    • 39
    • 59

    Decreasing Clouds

    • 40
    • 61

    Increasing Clouds

    • 28
    • 50

    Snow

    • 18
    • 33

    Snow

    • 13
    • 27

    Snow Likely

    • 16
    • 32

    Slight Chance Snow

    • 20
    • 37

    Partly Sunny

Today 20 Apr Gallatin and Madison County Mountains and Centennial Mountains

Warmer. Mostly sunny. Highs 53 to 65. Southwest Winds 10 to 15 Mph with Gusts to around 35 Mph.

Tonight 20 Apr Gallatin and Madison County Mountains and Centennial Mountains

Partly cloudy. Lows 35 to 43. South Winds 5 to 15 Mph with Gusts to around 35 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Big Sky Temperature Statistics

April Temperature

Ennis - Big Sky Airport (13.7 miles)

  • Lowest 17 April, 2026

    15.8 °F

  • Average April

    41 °F

  • Highest 7 April, 2026

    68 °F

Climate (2021–Present)

Ennis - Big Sky Airport (13.7 miles)

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  • Average Low 2021–2026

    32.1 °F

  • Average 2021–2026

    44.6 °F

  • Average High 2021–2026

    56.5 °F
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