Isle Royale National Park Weather Forecast

    • 56
    • 74

    Chance Rain Showers

    • 57
    • 75

    Decreasing Clouds

    • 58
    • 76

    Areas Smoke

    • 59
    • 75

    Chance Thunderstorms

    • 61
    • 77

    Chance Rain Showers

    • 59
    • 78

    Slight Chance Thunderstorms

    • 59
    • 77

    Partly Sunny

Today 18 Jul Keweenaw

Cloudy with a 50 percent chance of Showers. Southwest Winds 5 to 15 Mph Inland, except light west Winds near the shore.

Tonight 18 Jul Keweenaw

Cloudy with scattered Showers. Patchy fog after midnight. Lows in the mid 50s. Light southwest Winds. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Isle Royale National Park Temperature Statistics

July Temperature

Copper Harbor (60.3 miles)

  • Lowest 16 July, 2025

    48.9 °F

  • Average July

    64 °F

  • Highest 13 July, 2025

    85.6 °F

Climate (2020–Present)

Copper Harbor (60.3 miles)

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  • Average Low 2020–2025

    38.5 °F

  • Average 2020–2025

    44.6 °F

  • Average High 2020–2025

    50.8 °F
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