Island Lake Weather Forecast

    • 36
    • 55

    Rain Showers Likely

    • 31
    • 52

    Rain/Snow

    • 38
    • 60

    Mostly Sunny

    • 38
    • 60

    Chance Rain Showers

    • 35
    • 58

    Slight Chance Thunderstorms

    • 36
    • 58

    Slight Chance Thunderstorms

    • 36
    • 59

    Slight Chance Thunderstorms

Today 29 Aug Absaroka Mountains

Showers with a chance of Thunderstorms. Some Thunderstorms may produce heavy rainfall. Highs in the upper 50s. West Winds 10 to 15 Mph with Gusts up to 30 Mph. Chance of rain 80 percent.

Tonight 29 Aug Absaroka Mountains

Partly cloudy this Evening, then becoming mostly cloudy. A slight chance of Thunderstorms. A chance of rain Showers this Evening, then rain Showers likely after midnight. Some Thunderstorms may produce heavy rainfall. Lows in the lower 40s. West Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 60 percent.

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Island Lake Temperature Statistics

August Temperature

Powell Municipal Airport (36.7 miles)

  • Lowest 4 August, 2026

    42.8 °F

  • Average August

    70.2 °F

  • Highest 1 August, 2026

    98.6 °F

Climate (2021–2026)

Powell Municipal Airport (36.7 miles)

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  • Average Low 2021–2026

    35.2 °F

  • Average 2021–2026

    45.9 °F

  • Average High 2021–2026

    57.3 °F
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