Lost Lake Weather Forecast

    • 52
    • 68

    Mostly Cloudy

    • 52
    • 67

    Mostly Cloudy

    • 53
    • 66

    Rain Likely

    • 49
    • 66

    Chance Rain

    • 50
    • 66

    Mostly Cloudy

    • 50
    • 66

    Partly Sunny

Today 22 Sep Island County

Mostly cloudy with a chance of rain. Highs in the lower to mid 60s.

Tonight 22 Sep Island County

Mostly cloudy. Lows in the upper 40s to mid 50s. Light wind becoming south to 10 Mph after midnight.

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  • Temperature Real-Time

Lost Lake Temperature Statistics

September Temperature

Arlington Municipal Airport (14.9 miles)

  • Lowest 16 September, 2026

    44.1 °F

  • Average September

    59.3 °F

  • Highest 9 September, 2026

    78.1 °F

Climate (2021–2026)

Arlington Municipal Airport (14.9 miles)

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  • Average Low 2021–2026

    42.6 °F

  • Average 2021–2026

    50.9 °F

  • Average High 2021–2026

    59.9 °F
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