Lake Manganese Weather Forecast

    • 64
    • 69

    Rain Showers

    • 64
    • 71

    Partly Sunny

    • 67
    • 74

    Mostly Sunny

    • 69
    • 78

    Partly Sunny

    • 65
    • 79

    Partly Sunny

    • 62
    • 73

    Partly Sunny

Today 18 Aug Keweenaw

Showers in the Morning, then Showers likely with a chance of Thunderstorms in the afternoon. Highs 64 to 69. Southeast Winds 10 to 20 Mph. Chance of rain 90 percent.

Tonight 18 Aug Keweenaw

Showers likely with a slight chance of Thunderstorms in the Evening, then a chance of Showers after midnight. Cloudy. Lows 59 to 64. Southeast Winds 5 to 15 Mph, becoming north 5 to 10 Mph after midnight. Chance of rain 60 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Manganese Temperature Statistics

August Temperature

Copper Harbor (0.6 miles)

  • Lowest 14 August, 2025

    55.9 °F

  • Average August

    72 °F

  • Highest 8 August, 2025

    86.6 °F

Climate (2020–Present)

Copper Harbor (0.6 miles)

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  • Average Low 2020–2025

    38.5 °F

  • Average 2020–2025

    44.7 °F

  • Average High 2020–2025

    50.8 °F
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