Isle Royale National Park Weather Forecast

    • 17
    • 35

    Mostly Cloudy

    • 17
    • 26

    Mostly Cloudy

    • 24
    • 31

    Slight Chance Snow Showers

    • 14
    • 32

    Mostly Cloudy

    • 20
    • 28

    Snow Showers Likely

    • 10
    • 29

    Partly Sunny

    • 14
    • 25

    Partly Sunny

Today 21 Mar Keweenaw

Cloudy with a 20 percent chance of snow Showers. East Winds 5 to 15 Mph with Gusts up to 30 Mph.

Tonight 21 Mar Keweenaw

Cloudy. Lows in the lower 20s. Northeast Winds 10 to 20 Mph with Gusts up to 30 Mph.

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  • Temperature Real-Time

Isle Royale National Park Temperature Statistics

March Temperature

Copper Harbor (60.3 miles)

  • Lowest 1 March, 2026

    1 °F

  • Average March

    27.7 °F

  • Highest 9 March, 2026

    51.1 °F

Climate (2021–Present)

Copper Harbor (60.3 miles)

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  • Average Low 2021–2026

    38.5 °F

  • Average 2021–2026

    44.7 °F

  • Average High 2021–2026

    50.9 °F
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