Cook County Lake Weather Forecast

    • 41
    • 58

    Partly Sunny

    • 53
    • 67

    Chance Thunderstorms

    • 50
    • 71

    Slight Chance Thunderstorms

    • 49
    • 73

    Partly Sunny

    • 52
    • 70

    Chance Rain Showers

    • 57
    • 74

    Slight Chance Rain Showers

    • 56
    • 76

    Partly Sunny

Today 7 Sep Northern Cook/Northern Lake

Mostly sunny. Near steady temperature in the mid 50s. West Winds 5 to 10 Mph.

Tonight 7 Sep Northern Cook/Northern Lake

Partly cloudy. Lows around 40. Southwest Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Cook County Lake Temperature Statistics

September Temperature

Grand Marais/Cook County Airport (34.8 miles)

  • Lowest 3 September, 2025

    37.4 °F

  • Average September

    50.2 °F

  • Highest 1 September, 2025

    75.2 °F

Climate (2020–Present)

Grand Marais/Cook County Airport (34.8 miles)

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  • Average Low 2020–2025

    28.7 °F

  • Average 2020–2025

    38.1 °F

  • Average High 2020–2025

    46.6 °F
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