Grace Harbor Weather Forecast

    • 55
    • 63

    Decreasing Clouds

    • 55
    • 60

    Mostly Cloudy

    • 57
    • 64

    Partly Sunny

    • 58
    • 66

    Mostly Cloudy

    • 55
    • 64

    Chance Rain Showers

    • 52
    • 60

    Chance Rain Showers

Today 13 Sep Keweenaw

Mostly cloudy in the Morning, then becoming mostly sunny. Patchy fog in the morning. Highs around 70. Light northeast Winds, becoming east 5 to 10 Mph in the afternoon.

Tonight 13 Sep Keweenaw

Mostly cloudy. Lows around 54. Light east Winds.

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Grace Harbor Temperature Statistics

September Temperature

Grand Marais, The Bay of Grand Marais (52.2 miles)

  • Lowest 3 September, 2025

    41 °F

  • Average September

    52.4 °F

  • Highest 1 September, 2025

    68 °F

Climate (2020–Present)

Grand Marais, The Bay of Grand Marais (52.2 miles)

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  • Average Low 2020–2025

    33.8 °F

  • Average 2020–2025

    41.2 °F

  • Average High 2020–2025

    48.4 °F
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