West Yellowstone Weather Forecast

    • 31
    • 58

    Rain Showers

    • 32
    • 64

    Rain Showers

    • 29
    • 70

    Mostly Sunny

    • 31
    • 73

    Mostly Sunny

    • 33
    • 75

    Partly Sunny

    • 33
    • 73

    Isolated Thunderstorms

Today 15 Sep Gallatin and Madison County Mountains and Centennial Mountains

Cooler. Mostly cloudy. Patchy fog in the morning. Chance of rain in the Morning, then rain Showers likely and chance of Thunderstorms in the afternoon. Highs 45 to 55. Southwest Winds up to 10 Mph. Chance of precipitation 70 percent.

Tonight 15 Sep Gallatin and Madison County Mountains and Centennial Mountains

Mostly cloudy. Chance of Thunderstorms and slight chance of rain in the Evening, then slight chance of rain after midnight. Patchy fog after midnight. Lows 35 to 40. North Winds up to 10 Mph. Chance of precipitation 50 percent.

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West Yellowstone Temperature Statistics

September Temperature

West Yellowstone (1.2 miles)

  • Lowest 6 September, 2025

    28.4 °F

  • Average September

    54.4 °F

  • Highest 3 September, 2025

    82.4 °F

Climate (2020–Present)

West Yellowstone (1.2 miles)

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  • Average Low 2020–2025

    33.5 °F

  • Average 2020–2025

    50.8 °F

  • Average High 2020–2025

    66.1 °F
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