Copper Harbor Weather Forecast

    • 53
    • 67

    Partly Sunny

    • 52
    • 66

    Increasing Clouds

    • 53
    • 66

    Mostly Cloudy

    • 56
    • 65

    Mostly Cloudy

    • 56
    • 65

    Chance Rain Showers

    • 54
    • 64

    Chance Rain Showers

    • 51
    • 61

    Slight Chance Rain Showers

Today 25 Sep Keweenaw

Mostly sunny. Light east Winds.

Tonight 25 Sep Keweenaw

Mostly clear. Patchy fog after midnight. Lows in the lower 50s. Light southeast Winds, becoming east after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Copper Harbor Temperature Statistics

September Temperature

Copper Harbor (0.6 miles)

  • Lowest 22 September, 2026

    39.9 °F

  • Average September

    60.8 °F

  • Highest 1 September, 2026

    80.1 °F

Climate (2021–2026)

Copper Harbor (0.6 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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