Grand Portage Weather Forecast

    • 37
    • 60

    Mostly Sunny

    • 42
    • 54

    Increasing Clouds

    • 47
    • 64

    Partly Sunny

    • 42
    • 62

    Mostly Sunny

    • 40
    • 59

    Partly Sunny

    • 42
    • 56

    Mostly Cloudy

    • 50
    • 61

    Mostly Cloudy

Today 4 Oct Southern Cook/North Shore

Mostly sunny. A slight chance of Showers in the afternoon. Highs in the lower 60s. Chance of rain 20 percent.

Tonight 4 Oct Southern Cook/North Shore

Partly cloudy late this Evening, then becoming mostly clear. A chance of Sprinkles late this evening. Patchy frost. Cooler with Lows in the mid 30s. Northwest Winds 5 to 10 Mph with Gusts up to 20 Mph.

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Grand Portage Temperature Statistics

October Temperature

Grand Marais/Cook County Airport (33.6 miles)

  • Lowest 2 October, 2026

    35.6 °F

  • Average October

    49.1 °F

  • Highest 1 October, 2026

    60.8 °F

Climate (2021–2026)

Grand Marais/Cook County Airport (33.6 miles)

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  • Average Low 2021–2026

    28.7 °F

  • Average 2021–2026

    38 °F

  • Average High 2021–2026

    46.5 °F
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