Grand Marais Harbor Weather Forecast

    • 24
    • 31

    Partly Sunny

    • 30
    • 33

    Breezy

    • 33
    • 38

    Rain/Snow

    • 32
    • 39

    Partly Sunny

    • 32
    • 39

    Partly Sunny

    • 30
    • 39

    Partly Sunny

Today 31 Mar Keweenaw

Sunny. Near steady temperature in the upper 20s. North Winds 5 to 15 Mph.

Tonight 31 Mar Keweenaw

Mostly clear. Lows 19 to 24. Northwest Winds 5 to 10 Mph, becoming northeast after midnight.

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Grand Marais Harbor Temperature Statistics

March Temperature

Copper Harbor (11.2 miles)

  • Lowest 8 March, 2025

    7.8 °F

  • Average March

    30.9 °F

  • Highest 10 March, 2025

    58.6 °F

Climate (2020–Present)

Copper Harbor (11.2 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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