Lake Upson Weather Forecast

    • 62
    • 77

    Mostly Sunny

    • 62
    • 79

    Mostly Sunny

    • 55
    • 73

    Mostly Cloudy

    • 53
    • 65

    Partly Sunny

    • 52
    • 63

    Partly Sunny

    • 55
    • 67

    Chance Rain Showers

Today 15 Sep Keweenaw

Patchy fog this morning. Sunny, warmer with Highs in the mid 70s. South Winds 5 to 10 Mph, becoming southeast this afternoon.

Tonight 15 Sep Keweenaw

Clear in the Evening, then becoming partly cloudy. Lows around 59. South Winds 5 to 10 Mph, becoming southwest after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Upson Temperature Statistics

September Temperature

Copper Harbor (7.5 miles)

  • Lowest 4 September, 2025

    46.9 °F

  • Average September

    58.6 °F

  • Highest 1 September, 2025

    75.9 °F

Climate (2020–Present)

Copper Harbor (7.5 miles)

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  • Average Low 2020–2025

    38.5 °F

  • Average 2020–2025

    44.7 °F

  • Average High 2020–2025

    50.9 °F
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