Rock Harbor Weather Forecast

    • 59
    • 72

    Slight Chance Rain Showers

    • 54
    • 72

    Partly Sunny

    • 51
    • 64

    Partly Sunny

    • 51
    • 61

    Partly Sunny

    • 53
    • 62

    Mostly Cloudy

    • 53
    • 63

    Mostly Cloudy

Today 16 Sep Keweenaw

Patchy fog in the morning. Mostly sunny. Highs in the upper 70s. South Winds 5 to 10 Mph.

Tonight 16 Sep Keweenaw

Mostly clear with a slight chance of Showers and Thunderstorms. Patchy fog after midnight. Lows around 60. Southwest Winds 5 to 10 Mph, becoming west after midnight. Chance of rain 20 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Rock Harbor Temperature Statistics

September Temperature

Copper Harbor (54.1 miles)

  • Lowest 4 September, 2025

    46.9 °F

  • Average September

    58.6 °F

  • Highest 1 September, 2025

    75.9 °F

Climate (2020–Present)

Copper Harbor (54.1 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2020–2025

    38.5 °F

  • Average 2020–2025

    44.7 °F

  • Average High 2020–2025

    50.9 °F
Get WillyWeather+ to remove ads