Island Lake Weather Forecast

    • 56
    • 80

    Mostly Cloudy

    • 57
    • 79

    Mostly Sunny

    • 60
    • 80

    Chance Rain Showers

    • 55
    • 77

    Chance Thunderstorms

    • 52
    • 76

    Partly Sunny

    • 55
    • 77

    Partly Sunny

Today 19 Aug Branch

Patchy fog early this morning. Partly cloudy. Highs in the upper 70s. Northwest Winds around 5 Mph.

Tonight 19 Aug Branch

Partly cloudy. A slight chance of Showers in the evening. Lows in the mid 50s. North Winds around 5 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Island Lake Temperature Statistics

August Temperature

Branch County Memorial Airport (3.7 miles)

  • Lowest 9 August, 2026

    53.6 °F

  • Average August

    71.6 °F

  • Highest 8 August, 2026

    86 °F

Climate (2021–2026)

Branch County Memorial Airport (3.7 miles)

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  • Average Low 2021–2026

    41.3 °F

  • Average 2021–2026

    50.6 °F

  • Average High 2021–2026

    59.7 °F
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