Arrowhead Park Weather Forecast

    • 54
    • 66

    Slight Chance Thunderstorms

    • 54
    • 62

    Rain Showers Likely

    • 55
    • 66

    Rain Showers Likely

    • 55
    • 68

    Partly Sunny

    • 58
    • 71

    Mostly Sunny

    • 62
    • 73

    Chance Rain Showers

Today 16 Aug Southern Cook/North Shore

Mostly cloudy with a chance of Showers and Thunderstorms late this Morning, then partly sunny with a slight chance of Showers this afternoon. Cooler with Highs in the upper 60s. Northeast Winds 5 to 10 Mph. Chance of rain 50 percent.

Tonight 16 Aug Southern Cook/North Shore

Partly cloudy in the Evening, then becoming mostly clear. Cooler with Lows around 50. Northeast Winds 5 to 10 Mph with Gusts up to 25 Mph.

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Arrowhead Park Temperature Statistics

August Temperature

Grand Marais, The Bay of Grand Marais (14.3 miles)

  • Lowest 2 August, 2025

    50.6 °F

  • Average August

    66.2 °F

  • Highest 2 August, 2025

    75.7 °F

Climate (2020–Present)

Grand Marais, The Bay of Grand Marais (14.3 miles)

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  • Average Low 2020–2025

    33.8 °F

  • Average 2020–2025

    41.2 °F

  • Average High 2020–2025

    48.3 °F
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