Island Park Reservoir Weather Forecast

    • 7
    • 29

    Becoming Sunny

    • 9
    • 31

    Sunny

    • 8
    • 34

    Mostly Sunny

    • 10
    • 34

    Mostly Sunny

    • 13
    • 33

    Partly Sunny

    • 16
    • 33

    Mostly Cloudy

Today 16 Jan Centennial Mountains/Island Park

Sunny. Patchy freezing fog in the morning. Highs 27 to 34.

Tonight 16 Jan Centennial Mountains/Island Park

Mostly clear. Lows 9 to 19.

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Island Park Reservoir Temperature Statistics

January Temperature

West Yellowstone (27.3 miles)

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  • Average January

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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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