Grand Portage Weather Forecast

    • 34
    • 43

    Rain Showers Likely

    • 35
    • 44

    Rain Showers

    • 37
    • 54

    Partly Sunny

    • 41
    • 53

    Chance Rain Showers

    • 44
    • 60

    Chance Rain Showers

    • 39
    • 58

    Partly Sunny

Today 11 May Southern Cook/North Shore

Sunny. Highs in the upper 40s. South Winds 5 to 10 Mph.

Tonight 11 May Southern Cook/North Shore

Mostly cloudy. A chance of rain Showers after midnight. Cold with Lows in the lower 30s. Southeast Winds around 5 Mph. Gusts up to 20 Mph after midnight. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Grand Portage Temperature Statistics

May Temperature

Grand Marais/Cook County Airport (33.6 miles)

  • Lowest 2 May, 2026

    21.2 °F

  • Average May

    38.7 °F

  • Highest 3 May, 2026

    57.2 °F

Climate (2021–Present)

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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