Isle Royale Weather Forecast

    • 27
    • 36

    Snow Showers Likely

    • 15
    • 30

    Snow Showers Likely

    • 22
    • 28

    Mostly Cloudy

    • 26
    • 31

    Snow Showers

    • 27
    • 35

    Snow Showers Likely

    • 24
    • 33

    Snow Showers Likely

    • 23
    • 35

    Partly Sunny

Today 30 Mar Keweenaw

Cloudy with a 20 percent chance of snow Showers. Northeast Winds 10 to 15 Mph.

Tonight 30 Mar Keweenaw

Cloudy. A slight chance of snow Showers in the Evening, then a chance of snow Showers with a slight chance of freezing rain after midnight. Near steady temperature around 30. Northeast Winds 10 to 15 Mph, becoming east after midnight. Chance of precipitation 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Isle Royale Temperature Statistics

March Temperature

Copper Harbor (58.4 miles)

  • Lowest 1 March, 2026

    1 °F

  • Average March

    28.1 °F

  • Highest 9 March, 2026

    51.1 °F

Climate (2021–Present)

Copper Harbor (58.4 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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