Harriman State Park Weather Forecast

    • 31
    • 56

    Rain Showers

    • 27
    • 55

    Partly Sunny

    • 32
    • 61

    Mostly Sunny

    • 35
    • 67

    Sunny

    • 38
    • 70

    Chance Rain Showers

    • 38
    • 67

    Rain Showers Likely

    • 35
    • 57

    Rain Showers Likely

Today 29 Apr Centennial Mountains/Island Park

Partly sunny. A chance of rain Showers and a slight chance of Thunderstorms in the afternoon. Highs 53 to 62.

Tonight 29 Apr Centennial Mountains/Island Park

Mostly cloudy. A chance of rain Showers and a slight chance of Thunderstorms in the evening. Then a chance of rain Showers after midnight. Lows 30 to 38.

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Harriman State Park Temperature Statistics

April Temperature

West Yellowstone (28.6 miles)

  • Lowest 27 April, 2025

    24.8 °F

  • Average April

    35.8 °F

  • Highest 27 April, 2025

    53.6 °F

Climate (2020–Present)

West Yellowstone (28.6 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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