Island Lake Weather Forecast

    • 56
    • 64

    Rain Showers

    • 49
    • 68

    Rain Showers

    • 52
    • 69

    Rain Showers

    • 51
    • 67

    Rain Showers

    • 48
    • 66

    Partly Sunny

    • 47
    • 69

    Mostly Sunny

    • 46
    • 66

    Partly Sunny

Today 25 Sep Barnes

Partly sunny. Highs in the mid 60s.

Tonight 25 Sep Barnes

Cloudy. Showers after midnight. Lows in the mid 50s. Southeast Winds 10 to 20 Mph. Chance of rain 90 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Island Lake Temperature Statistics

September Temperature

Jamestown, Jamestown Municipal Airport (13.7 miles)

  • Lowest 16 September, 2026

    36.6 °F

  • Average September

    62.8 °F

  • Highest 4 September, 2026

    85.6 °F

Climate (2021–2026)

Jamestown, Jamestown Municipal Airport (13.7 miles)

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  • Average Low 2021–2026

    32.9 °F

  • Average 2021–2026

    43.5 °F

  • Average High 2021–2026

    54.2 °F
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