Island Park Reservoir Weather Forecast

    • 25
    • 40

    Chance Snow

    • 31
    • 39

    Rain/Snow

    • 17
    • 40

    Snow

    • 27
    • 32

    Snow

    • 23
    • 39

    Rain/Snow

    • 20
    • 35

    Chance Snow

Today 15 Dec Centennial Mountains/Island Park

Increasing Clouds. Highs 37 to 44.

Tonight 15 Dec Centennial Mountains/Island Park

Mostly cloudy with a slight chance of snow. Lows 22 to 32.

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Island Park Reservoir Temperature Statistics

December Temperature

West Yellowstone (27.3 miles)

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  • Average December

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Climate (2021–Present)

West Yellowstone (27.3 miles)

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  • Average Low 2021–2025

    34 °F

  • Average 2021–2025

    51.3 °F

  • Average High 2021–2025

    66.6 °F
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