Grizzly Lake Weather Forecast

    • 36
    • 65

    Mostly Cloudy

    • 33
    • 60

    Rain Showers

    • 36
    • 61

    Slight Chance Thunderstorms

    • 32
    • 57

    Rain Showers Likely

    • 31
    • 57

    Chance Rain Showers

    • 33
    • 61

    Mostly Sunny

    • 36
    • 65

    Mostly Sunny

Today 12 Sep Yellowstone National Park

Partly cloudy with scattered Showers with isolated Thunderstorms. Some Thunderstorms may produce gusty Winds. Highs in the mid 60s. Southwest Winds around 10 Mph. Chance of rain 30 percent.

Tonight 12 Sep Yellowstone National Park

Isolated Thunderstorms in the evening. Cloudy with scattered rain Showers. Some Thunderstorms may produce gusty Winds in the evening. Lows in the upper 30s. Southeast Winds around 10 Mph with Gusts up to 20 Mph in the evening. Chance of rain 30 percent.

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Grizzly Lake Temperature Statistics

September Temperature

West Yellowstone (18.6 miles)

  • Lowest 6 September, 2025

    28.4 °F

  • Average September

    55 °F

  • Highest 3 September, 2025

    82.4 °F

Climate (2020–Present)

West Yellowstone (18.6 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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