Grand Marais Harbor Weather Forecast

    • 48
    • 64

    Chance Rain Showers

    • 40
    • 51

    Mostly Cloudy

    • 38
    • 43

    Mostly Cloudy

    • 44
    • 46

    Chance Rain Showers

    • 45
    • 57

    Chance Rain Showers

    • 42
    • 49

    Breezy

    • 44
    • 50

    Mostly Cloudy

Today 24 Oct Keweenaw

Cloudy with a 50 percent chance of rain Showers. Highs 51 to 56.

Tonight 24 Oct Keweenaw

Cloudy. A chance of rain Showers in the evening. Lows in the mid 40s. West Winds 5 to 10 Mph, becoming northwest after midnight. Chance of rain 50 percent.

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Grand Marais Harbor Temperature Statistics

October Temperature

Copper Harbor (11.2 miles)

  • Lowest 20 October, 2026

    35.1 °F

  • Average October

    52.2 °F

  • Highest 11 October, 2026

    77 °F

Climate (2021–2026)

Copper Harbor (11.2 miles)

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  • Average Low 2021–2026

    38.1 °F

  • Average 2021–2026

    44.3 °F

  • Average High 2021–2026

    50.5 °F
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