Romy Lake Weather Forecast

    • 29
    • 44

    Increasing Clouds

    • 29
    • 46

    Mostly Sunny

    • 31
    • 44

    Mostly Cloudy

    • 29
    • 41

    Snow Likely

    • 20
    • 35

    Chance Snow

    • 26
    • 35

    Chance Snow

Today 13 Dec Gallatin and Madison County Mountains and Centennial Mountains

Mostly sunny. Highs 34 to 44. Southwest Winds 5 to 15 Mph with Gusts to around 30 Mph.

Tonight 13 Dec Gallatin and Madison County Mountains and Centennial Mountains

Partly cloudy. Lows 21 to 33. South Winds 5 to 15 Mph with Gusts to around 35 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Romy Lake Temperature Statistics

December Temperature

Ennis - Big Sky Airport (17.4 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 (17.4 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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