Isle Royale National Park Weather Forecast

    • 23
    • 34

    Increasing Clouds

    • 22
    • 29

    Mostly Cloudy

    • 25
    • 32

    Mostly Cloudy

    • 26
    • 32

    Mostly Cloudy

    • 28
    • 35

    Mostly Cloudy

    • 30
    • 36

    Mostly Cloudy

Today 3 Dec Keweenaw

Cloudy early in the afternoon then becoming partly cloudy. Highs around 35. West Winds 10 to 20 Mph.

Tonight 3 Dec Keweenaw

Partly cloudy in the Evening, then mostly cloudy with a 20 percent chance of snow Showers overnight. Lows 22 to 27. Northwest Winds 10 to 15 Mph becoming north overnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Isle Royale National Park Temperature Statistics

December Temperature

Copper Harbor (60.3 miles)

  • Lowest 1 December, 2020

    28 °F

  • Average December

    29.9 °F

  • Highest 1 December, 2020

    32 °F

Climate (2010–Present)

Copper Harbor (60.3 miles)

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  • Average Low 2010–Present

    37.1 °F

  • Average 2010–Present

    42.7 °F

  • Average High 2010–Present

    48.5 °F
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