Agate Harbor Weather Forecast

    • 63
    • 73

    Chance Rain Showers

    • 58
    • 68

    Windy

    • 60
    • 66

    Mostly Sunny

    • 61
    • 75

    Rain Showers Likely

    • 55
    • 67

    Breezy

    • 55
    • 63

    Mostly Cloudy

Today 8 Sep Keweenaw

Cloudy with a slight chance of Showers and Thunderstorms. South Winds 10 to 15 Mph with Gusts up to 30 Mph. Chance of rain 20 percent.

Tonight 8 Sep Keweenaw

Cloudy with a slight chance of Showers in the Evening, then mostly clear after midnight. Lows in the mid 60s. Southwest Winds 10 to 15 Mph, becoming west 10 to 20 Mph after midnight. Gusts up to 35 Mph. Chance of rain 20 percent.

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Agate Harbor Temperature Statistics

September Temperature

Copper Harbor (8.7 miles)

  • Lowest 5 September, 2026

    54 °F

  • Average September

    65.3 °F

  • Highest 1 September, 2026

    80.1 °F

Climate (2021–2026)

Copper Harbor (8.7 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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