Washington Harbor Weather Forecast

    • 61
    • 65

    Rain Showers Likely

    • 58
    • 67

    Mostly Cloudy

    • 65
    • 69

    Mostly Sunny

    • 66
    • 73

    Partly Sunny

    • 62
    • 74

    Slight Chance Rain Showers

    • 59
    • 66

    Partly Sunny

Today 18 Aug Keweenaw

Showers likely with a slight chance of Thunderstorms in the Morning, then Showers likely with a chance of Thunderstorms in the afternoon. Highs in the mid 60s. Southeast Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 70 percent.

Tonight 18 Aug Keweenaw

A slight chance of Thunderstorms in the evening. Cloudy with a chance of Showers. Lows around 61. Southeast Winds 5 to 15 Mph, becoming south 5 to 10 Mph after midnight. Chance of rain 50 percent.

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Washington Harbor Temperature Statistics

August Temperature

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

  • Lowest 2 August, 2025

    50.6 °F

  • Average August

    66.3 °F

  • Highest 2 August, 2025

    75.7 °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

    48.3 °F
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