Upper Mason Lake Weather Forecast

    • 23
    • 29

    Increasing Clouds

    • 19
    • 39

    Mostly Sunny

    • 22
    • 32

    Partly Sunny

    • 29
    • 36

    Partly Sunny

    • 33
    • 42

    Chance Rain/Snow

    • 23
    • 36

    Partly Sunny

    • 28
    • 35

    Mostly Cloudy

Today 28 Oct Gallatin and Madison County Mountains and Centennial Mountains

Sunny. Highs 30 to 40. Southwest Winds up to 10 Mph.

Tonight 28 Oct Gallatin and Madison County Mountains and Centennial Mountains

Partly cloudy. Lows 20 to 25. South Winds 5 to 15 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Upper Mason Lake Temperature Statistics

October Temperature

Ennis - Big Sky Airport (29.2 miles)

  • Lowest 6 October, 2025

    23 °F

  • Average October

    45.4 °F

  • Highest 10 October, 2025

    71.6 °F

Climate (2020–Present)

Ennis - Big Sky Airport (29.2 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2020–2025

    31.5 °F

  • Average 2020–2025

    43.8 °F

  • Average High 2020–2025

    55.7 °F
Get WillyWeather+ to remove ads