Washington Harbor Weather Forecast

    • 52
    • 66

    Mostly Cloudy

    • 45
    • 59

    Partly Sunny

    • 46
    • 56

    Mostly Sunny

    • 46
    • 58

    Chance Rain Showers

    • 43
    • 58

    Partly Sunny

    • 45
    • 56

    Partly Sunny

Today 30 Sep Keweenaw

Mostly cloudy in the Morning, then becoming mostly sunny. Highs in the upper 60s. Southwest Winds 5 to 15 Mph, becoming west in the afternoon.

Tonight 30 Sep Keweenaw

Partly cloudy in the Evening, then becoming cloudy. Lows around 53. West Winds 5 to 10 Mph, becoming northwest 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 20 September, 2026

    39.9 °F

  • Average September

    57.3 °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

    47.8 °F
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