Fan Mountain Weather Forecast

    • 52
    • 75

    Slight Chance Thunderstorms

    • 50
    • 73

    Slight Chance Thunderstorms

    • 51
    • 75

    Mostly Sunny

    • 52
    • 77

    Mostly Sunny

    • 54
    • 82

    Mostly Sunny

    • 42
    • 77

    Mostly Sunny

Today 28 Jul Gallatin and Madison County Mountains and Centennial Mountains

Sunny. Patchy smoke through the day. A 20 percent chance of Thunderstorms in the afternoon. Highs 76 to 86. South Winds up to 10 Mph shifting to the southwest in the afternoon. Gusts up to 30 Mph.

Tonight 28 Jul Gallatin and Madison County Mountains and Centennial Mountains

Partly cloudy. A 20 percent chance of rain Showers in the evening. Lows 52 to 58. South Winds up to 10 Mph. Gusts up to 30 Mph in the evening.

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Fan Mountain Temperature Statistics

July Temperature

Ennis - Big Sky Airport (6.2 miles)

  • Lowest 1 July, 2026

    41 °F

  • Average July

    68.9 °F

  • Highest 12 July, 2026

    98.6 °F

Climate (2021–2026)

Ennis - Big Sky Airport (6.2 miles)

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  • Average Low 2021–2026

    32 °F

  • Average 2021–2026

    44.4 °F

  • Average High 2021–2026

    56.3 °F
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