Island Lake Weather Forecast

    • 41
    • 66

    Increasing Clouds

    • 39
    • 61

    Mostly Cloudy

    • 41
    • 63

    Mostly Sunny

    • 45
    • 66

    Partly Sunny

    • 46
    • 68

    Partly Sunny

    • 47
    • 73

    Partly Sunny

Today 20 Sep Northern Marinette County

Partly cloudy. Highs in the middle 60s. Northeast wind 10 to 15 Mph.

Tonight 20 Sep Northern Marinette County

Mostly cloudy. Lows around 40. Northeast wind 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Island Lake Temperature Statistics

September Temperature

Menominee - Marinette Twin County Airport (24.9 miles)

  • Lowest 14 September, 2026

    42.1 °F

  • Average September

    66.6 °F

  • Highest 1 September, 2026

    88 °F

Climate (2021–2026)

Menominee - Marinette Twin County Airport (24.9 miles)

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  • Average Low 2021–2026

    37.8 °F

  • Average 2021–2026

    46.5 °F

  • Average High 2021–2026

    54.6 °F
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