Lake Upson Weather Forecast

    • 66
    • 80

    Chance Rain Showers

    • 63
    • 82

    Partly Sunny

    • 61
    • 76

    Partly Sunny

    • 61
    • 71

    Partly Sunny

    • 61
    • 71

    Mostly Cloudy

    • 62
    • 73

    Partly Sunny

Today 31 Aug Keweenaw

Warmer. Mostly cloudy with a slight chance of Thunderstorms. A chance of Showers in the Morning, then a slight chance of Showers in the afternoon. Highs 69 to 74 inland to around 79 at the shore. Southeast Winds 5 to 10 Mph. Chance of rain 50 percent.

Tonight 31 Aug Keweenaw

Mostly cloudy in the Evening, then becoming partly cloudy. Lows 61 to 66. West Winds 5 to 10 Mph, becoming southwest after midnight.

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Lake Upson Temperature Statistics

August Temperature

Copper Harbor (7.5 miles)

  • Lowest 25 August, 2026

    52 °F

  • Average August

    63.5 °F

  • Highest 6 August, 2026

    81 °F

Climate (2021–2026)

Copper Harbor (7.5 miles)

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  • Average Low 2021–2026

    38.2 °F

  • Average 2021–2026

    44.4 °F

  • Average High 2021–2026

    50.5 °F
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