Island Park Weather Forecast

    • 36
    • 63

    Chance Rain Showers

    • 36
    • 67

    Chance Rain Showers

    • 39
    • 71

    Mostly Sunny

    • 40
    • 73

    Partly Sunny

    • 40
    • 70

    Chance Rain Showers

    • 42
    • 74

    Slight Chance Rain Showers

Today 23 May Centennial Mountains/Island Park

Sunny. A slight chance of rain Showers in the afternoon. Highs 59 to 66.

Tonight 23 May Centennial Mountains/Island Park

Mostly cloudy with a slight chance of Showers and Thunderstorms in the evening. Then partly cloudy after midnight. Some Thunderstorms may produce gusty Winds in the evening. Lows 35 to 44.

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Island Park Temperature Statistics

May Temperature

West Yellowstone (21.7 miles)

  • Lowest 1 May, 2025

    21.2 °F

  • Average May

    43.7 °F

  • Highest 10 May, 2025

    73.4 °F

Climate (2020–Present)

West Yellowstone (21.7 miles)

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  • Average Low 2020–2025

    33.4 °F

  • Average 2020–2025

    50.5 °F

  • Average High 2020–2025

    65.7 °F
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