Grand Portage Weather Forecast

    • 54
    • 75

    Increasing Clouds

    • 49
    • 72

    Mostly Sunny

    • 46
    • 71

    Mostly Sunny

    • 56
    • 71

    Partly Sunny

    • 56
    • 73

    Chance Rain Showers

    • 52
    • 71

    Partly Sunny

Today 17 Aug Southern Cook/North Shore

Mostly sunny. Highs in the upper 70s. West Winds 5 to 10 Mph.

Tonight 17 Aug Southern Cook/North Shore

Mostly cloudy. A chance of Showers with a slight chance of Thunderstorms in the evening. Lows in the lower 50s. West Winds 5 to 10 Mph, becoming northwest after midnight. Chance of rain 50 percent.

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Grand Portage Temperature Statistics

August Temperature

Grand Marais/Cook County Airport (33.6 miles)

  • Lowest 3 August, 2026

    48.2 °F

  • Average August

    62.9 °F

  • Highest 1 August, 2026

    77 °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

    38.1 °F

  • Average High 2021–2026

    46.6 °F
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