Isle Royale Weather Forecast

    • 3
    • 14

    Blowing Snow

    • 14
    • 20

    Slight Chance Snow Showers

    • 26
    • 32

    Slight Chance Snow Showers

    • 27
    • 36

    Chance Snow Showers

    • 27
    • 35

    Chance Snow Showers

    • 24
    • 34

    Slight Chance Snow Showers

Today 16 Mar Keweenaw

Windy. Cloudy with a 50 percent chance of snow. Heavy freezing spray with patchy blowing snow. North Winds 20 to 30 Mph with Gusts up to 60 Mph.

Tonight 16 Mar Keweenaw

Mostly cloudy with a 50 percent chance of snow Showers. Heavy freezing spray in the evening. Patchy blowing snow. Visibility one quarter mile or less at Times in the evening. Very windy with Lows 3 to 8 above. North Winds 25 to 35 Mph with Gusts up to 50 Mph, Diminishing to 15 to 25 Mph with Gusts up to 40 Mph after midnight. Wind chill Values as low as 20 below.

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Isle Royale Temperature Statistics

March Temperature

Copper Harbor (58.4 miles)

  • Lowest 1 March, 2026

    1 °F

  • Average March

    28.7 °F

  • Highest 9 March, 2026

    51.1 °F

Climate (2021–Present)

Copper Harbor (58.4 miles)

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  • Average Low 2021–2026

    38.6 °F

  • Average 2021–2026

    44.7 °F

  • Average High 2021–2026

    50.9 °F
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