Rock Island State Park Weather Forecast

    • 57
    • 69

    Slight Chance Thunderstorms

    • 56
    • 67

    Mostly Cloudy

    • 58
    • 67

    Chance Rain Showers

    • 58
    • 68

    Chance Rain Showers

    • 58
    • 69

    Chance Rain Showers

    • 56
    • 68

    Chance Rain Showers

Today 18 Sep Door

Mostly cloudy with a slight chance of Showers and Thunderstorms. Highs in the lower 70s. Northeast wind 5 to 10 Mph. Chance of rain 20 percent.

Tonight 18 Sep Door

Partly cloudy in the evening then becoming mostly cloudy. Lows in the upper 50s. Northeast wind 10 to 15 Mph.

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Rock Island State Park Temperature Statistics

September Temperature

Escanaba (24.9 miles)

  • Lowest 4 September, 2025

    37 °F

  • Average September

    58.4 °F

  • Highest 1 September, 2025

    75.9 °F

Climate (2020–Present)

Escanaba (24.9 miles)

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  • Average Low 2020–2025

    35.2 °F

  • Average 2020–2025

    44.3 °F

  • Average High 2020–2025

    52.4 °F
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