Fan Mountain Weather Forecast

    • 39
    • 64

    Rain Likely

    • 32
    • 41

    Rain/Snow

    • 29
    • 37

    Snow Showers

    • 30
    • 43

    Snow Showers Likely

    • 33
    • 52

    Slight Chance Thunderstorms

    • 37
    • 57

    Slight Chance Thunderstorms

Today 29 May Gallatin and Madison County Mountains and Centennial Mountains

Mostly sunny. Slight chance of rain late in the morning. Chance of rain Showers early in the afternoon. Slight chance of Thunderstorms in the afternoon. Highs 65 to 75. South Winds up to 15 Mph with Gusts to around 30 Mph. Chance of precipitation 40 percent.

Tonight 29 May Gallatin and Madison County Mountains and Centennial Mountains

Mostly cloudy. Chance of rain Showers and slight chance of Thunderstorms in the Evening, then chance of rain after midnight. Lows 41 to 47. Southwest Winds 5 to 10 Mph shifting to the northwest after midnight. Gusts up to 25 Mph. Chance of precipitation 50 percent.

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  • Temperature Real-Time

Fan Mountain Temperature Statistics

May Temperature

Ennis - Big Sky Airport (6.2 miles)

  • Lowest 6 May, 2026

    19.4 °F

  • Average May

    50.9 °F

  • Highest 13 May, 2026

    84.2 °F

Climate (2021–Present)

Ennis - Big Sky Airport (6.2 miles)

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  • Average Low 2021–2026

    32.1 °F

  • Average 2021–2026

    44.6 °F

  • Average High 2021–2026

    56.6 °F
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