South Arm Knife Lake Weather Forecast

    • 49
    • 71

    Decreasing Clouds

    • 56
    • 74

    Mostly Sunny

    • 59
    • 81

    Partly Sunny

    • 55
    • 81

    Chance Rain Showers

    • 55
    • 77

    Slight Chance Thunderstorms

    • 54
    • 77

    Partly Sunny

Today 4 Aug Northern Cook/Northern Lake

Partly sunny this Morning, then clearing. Cooler with Highs in the lower 70s. West Winds 5 to 10 Mph with Gusts up to 25 Mph.

Tonight 4 Aug Northern Cook/Northern Lake

Mostly clear. Lows in the upper 40s. West Winds 5 to 10 Mph.

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South Arm Knife Lake Temperature Statistics

August Temperature

Grand Marais/Cook County Airport (37.9 miles)

  • Lowest 1 August, 2026

    60.8 °F

  • Average August

    66.9 °F

  • Highest 1 August, 2026

    77 °F

Climate (2021–2026)

Grand Marais/Cook County Airport (37.9 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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