Isle Royale Weather Forecast

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    • 72

    Chance Rain Showers

    • 58
    • 73

    Rain Showers

    • 61
    • 83

    Chance Rain Showers

    • 61
    • 82

    Chance Rain Showers

    • 58
    • 77

    Chance Rain Showers

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    Slight Chance Rain Showers

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    Chance Rain Showers

Today 28 Jun Keweenaw

Mostly cloudy. East Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 28 Jun Keweenaw

Partly cloudy with a slight chance of Showers this Evening, then mostly cloudy with a chance of Showers and Thunderstorms after midnight. Lows in the upper 50s. Southeast Winds 5 to 10 Mph. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Isle Royale Temperature Statistics

June Temperature

Copper Harbor (58.4 miles)

  • Lowest 18 June, 2026

    43 °F

  • Average June

    56.6 °F

  • Highest 2 June, 2026

    75.9 °F

Climate (2021–2026)

Copper Harbor (58.4 miles)

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  • Average Low 2021–2026

    38.3 °F

  • Average 2021–2026

    44.5 °F

  • Average High 2021–2026

    50.7 °F
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