Washington Harbor Weather Forecast

    • 58
    • 71

    Increasing Clouds

    • 55
    • 71

    Partly Sunny

    • 52
    • 64

    Mostly Cloudy

    • 52
    • 61

    Mostly Cloudy

    • 54
    • 63

    Mostly Cloudy

    • 53
    • 64

    Slight Chance Rain Showers

Today 16 Sep Keweenaw

Patchy fog in the morning. Mostly sunny. Highs in the upper 70s. South Winds 5 to 10 Mph.

Tonight 16 Sep Keweenaw

Mostly clear with a slight chance of Showers and Thunderstorms. Patchy fog after midnight. Lows around 60. Southwest Winds 5 to 10 Mph, becoming west after midnight. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Washington Harbor Temperature Statistics

September Temperature

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

  • Lowest 3 September, 2025

    41 °F

  • Average September

    53.3 °F

  • Highest 1 September, 2025

    68 °F

Climate (2020–Present)

Grand Marais, The Bay of Grand Marais (54.1 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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