Washington Harbor Weather Forecast

    • 50
    • 60

    Mostly Sunny

    • 51
    • 61

    Mostly Sunny

    • 53
    • 60

    Mostly Cloudy

    • 52
    • 62

    Mostly Cloudy

    • 52
    • 62

    Chance Rain Showers

    • 51
    • 61

    Mostly Cloudy

    • 52
    • 62

    Chance Rain Showers

Today 22 Sep Keweenaw

Mostly cloudy with a 40 percent chance of Showers. Lows around 53. Highs 61 to 66.

Tonight 22 Sep Keweenaw

Clear. Lows in the upper 40s. East Winds 5 to 10 Mph with Gusts up to 20 Mph, becoming southeast after midnight.

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Washington Harbor Temperature Statistics

September Temperature

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

  • Lowest 20 September, 2026

    39.9 °F

  • Average September

    58.6 °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

    33.2 °F

  • Average 2021–2026

    40.7 °F

  • Average High 2021–2026

    47.9 °F
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