Washington Harbor Weather Forecast

    • 51
    • 65

    Mostly Sunny

    • 57
    • 60

    Increasing Clouds

    • 55
    • 66

    Partly Sunny

    • 56
    • 67

    Mostly Cloudy

    • 56
    • 67

    Mostly Cloudy

    • 56
    • 66

    Mostly Cloudy

    • 56
    • 67

    Partly Sunny

Today 15 Sep Keweenaw

Windy. Mostly sunny. West Winds 20 to 30 Mph with Gusts up to 55 Mph.

Tonight 15 Sep Keweenaw

Clear. Lows in the lower 50s. West Winds 10 to 20 Mph with Gusts up to 35 Mph, becoming northwest 5 to 10 Mph with Gusts up to 20 Mph after midnight.

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Washington Harbor Temperature Statistics

September Temperature

Grand Marais, The Bay of Grand Marais (54.1 miles)

  • Lowest 13 September, 2026

    46 °F

  • Average September

    62.2 °F

  • Highest 1 September, 2026

    75 °F

Climate (2021–2026)

Grand Marais, The Bay of Grand Marais (54.1 miles)

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  • Average Low 2021–2026

    33.3 °F

  • Average 2021–2026

    40.7 °F

  • Average High 2021–2026

    47.9 °F
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