Cook County Lake Weather Forecast

    • 48
    • 61

    Rain Showers

    • 42
    • 61

    Mostly Cloudy

    • 44
    • 64

    Mostly Cloudy

    • 45
    • 68

    Partly Sunny

    • 47
    • 70

    Chance Rain Showers

    • 44
    • 67

    Mostly Cloudy

Today 14 Sep Northern Cook/Northern Lake

Sunny this Morning, then Showers with a slight chance of Thunderstorms this afternoon. Highs around 60. South Winds 5 to 10 Mph with Gusts up to 25 Mph. Chance of rain near 100 percent.

Tonight 14 Sep Northern Cook/Northern Lake

Showers, mainly in the evening. Not as cool with Lows in the upper 40s. South Winds 10 to 15 Mph with Gusts up to 30 Mph. Chance of rain near 100 percent.

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Cook County Lake Temperature Statistics

September Temperature

Grand Marais/Cook County Airport (34.8 miles)

  • Lowest 10 September, 2026

    46.4 °F

  • Average September

    62.8 °F

  • Highest 1 September, 2026

    77 °F

Climate (2021–2026)

Grand Marais/Cook County Airport (34.8 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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