Long Island Lake Weather Forecast

    • 39
    • 65

    Decreasing Clouds

    • 42
    • 67

    Partly Sunny

    • 44
    • 68

    Mostly Cloudy

    • 46
    • 68

    Mostly Cloudy

    • 50
    • 75

    Partly Sunny

    • 46
    • 76

    Mostly Sunny

Today 25 May Northern Cook/Northern Lake

Mostly sunny. Highs in the mid 60s. East Winds around 5 Mph.

Tonight 25 May Northern Cook/Northern Lake

Partly cloudy. Patchy frost. Lows in the mid 30s. South Winds around 5 Mph.

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Long Island Lake Temperature Statistics

May Temperature

Grand Marais/Cook County Airport (21.1 miles)

  • Lowest 8 May, 2025

    26.6 °F

  • Average May

    50.6 °F

  • Highest 12 May, 2025

    80.6 °F

Climate (2020–Present)

Grand Marais/Cook County Airport (21.1 miles)

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  • Average Low 2020–2025

    28.9 °F

  • Average 2020–2025

    38.3 °F

  • Average High 2020–2025

    46.8 °F
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