Island Lake Weather Forecast

    • 55
    • 85

    Sunny

    • 54
    • 84

    Mostly Sunny

    • 55
    • 85

    Mostly Sunny

    • 56
    • 86

    Mostly Sunny

    • 58
    • 87

    Partly Sunny

    • 55
    • 82

    Chance Rain Showers

    • 53
    • 77

    Chance Rain Showers

Today 14 Sep Branch

Sunny. Near steady temperature in the lower 80s. East Winds 5 to 10 Mph.

Tonight 14 Sep Branch

Clear. Lows in the mid 50s. East Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Island Lake Temperature Statistics

September Temperature

Branch County Memorial Airport (3.7 miles)

  • Lowest 8 September, 2025

    37.4 °F

  • Average September

    59.8 °F

  • Highest 2 September, 2025

    80.6 °F

Climate (2020–Present)

Branch County Memorial Airport (3.7 miles)

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  • Average Low 2020–2025

    41.4 °F

  • Average 2020–2025

    50.5 °F

  • Average High 2020–2025

    59.6 °F
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