Patterson Lake Weather Forecast

    • 52
    • 59

    Partly Sunny

    • 53
    • 57

    Partly Sunny

    • 54
    • 63

    Chance Rain Showers

    • 55
    • 65

    Chance Rain Showers

    • 56
    • 67

    Mostly Cloudy

    • 54
    • 67

    Mostly Cloudy

Today 18 Sep Keweenaw

Partly cloudy and cooler. Near steady temperature in the upper 50s. Northeast Winds 10 to 15 Mph, becoming east 5 to 10 Mph this afternoon.

Tonight 18 Sep Keweenaw

Partly cloudy. Lows around 52. East Winds 5 to 10 Mph.

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Patterson Lake Temperature Statistics

September Temperature

Copper Harbor (55.9 miles)

  • Lowest 4 September, 2025

    46.9 °F

  • Average September

    60.3 °F

  • Highest 16 September, 2025

    81 °F

Climate (2020–Present)

Copper Harbor (55.9 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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