Lake Upson Weather Forecast

    • 54
    • 72

    Increasing Clouds

    • 39
    • 63

    Mostly Cloudy

    • 44
    • 57

    Partly Sunny

    • 44
    • 58

    Rain Showers Likely

    • 43
    • 55

    Breezy

    • 44
    • 53

    Partly Sunny

Today 30 Sep Keweenaw

Mostly cloudy in the Morning, then becoming mostly sunny. Highs 67 to 72. Southwest Winds 5 to 15 Mph with Gusts up to 25 Mph.

Tonight 30 Sep Keweenaw

Partly cloudy in the Evening, then becoming cloudy. Lows around 53. Southwest Winds 5 to 10 Mph, becoming west with Gusts up to 20 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Upson Temperature Statistics

September Temperature

Copper Harbor (7.5 miles)

  • Lowest 22 September, 2026

    39.9 °F

  • Average September

    60.4 °F

  • Highest 1 September, 2026

    80.1 °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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