Rock Harbor Weather Forecast

    • 38
    • 48

    Mostly Sunny

    • 39
    • 52

    Mostly Sunny

    • 39
    • 52

    Mostly Cloudy

    • 39
    • 50

    Chance Rain Showers

    • 40
    • 53

    Mostly Cloudy

    • 41
    • 56

    Mostly Cloudy

Today 20 May Keweenaw

Patchy frost in the morning. Sunny. Highs 48 to 53. Northwest Winds 5 to 10 Mph, becoming southwest in the afternoon.

Tonight 20 May Keweenaw

Clear. Patchy frost after midnight. Lows around 37. South Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Rock Harbor Temperature Statistics

May Temperature

Copper Harbor (54.1 miles)

  • Lowest 8 May, 2026

    30 °F

  • Average May

    43.8 °F

  • Highest 15 May, 2026

    79 °F

Climate (2021–Present)

Copper Harbor (54.1 miles)

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  • Average Low 2021–2026

    38.4 °F

  • Average 2021–2026

    44.6 °F

  • Average High 2021–2026

    50.8 °F
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