Isle Royale National Park Weather Forecast

    • 30
    • 35

    Increasing Clouds

    • 38
    • 49

    Chance Rain Showers

    • 18
    • 41

    Rain Showers

    • 18
    • 27

    Partly Sunny

    • 23
    • 32

    Mostly Cloudy

    • 21
    • 33

    Mostly Cloudy

    • 19
    • 30

    Chance Snow Showers

Today 13 Mar Keweenaw

Partly cloudy. East Winds 5 to 10 Mph.

Tonight 13 Mar Keweenaw

Mostly cloudy. Lows around 30. East Winds 5 to 15 Mph, becoming southeast after midnight.

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Isle Royale National Park Temperature Statistics

March Temperature

Copper Harbor (60.3 miles)

  • Lowest 8 March, 2025

    7 °F

  • Average March

    28.9 °F

  • Highest 9 March, 2025

    52 °F

Climate (2020–Present)

Copper Harbor (60.3 miles)

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  • Average Low 2020–2025

    38.6 °F

  • Average 2020–2025

    44.6 °F

  • Average High 2020–2025

    50.7 °F
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