Lost Lake Weather Forecast

    • 54
    • 71

    Mostly Cloudy

    • 53
    • 69

    Mostly Cloudy

    • 52
    • 68

    Mostly Cloudy

    • 52
    • 66

    Rain Likely

    • 50
    • 65

    Chance Rain

    • 50
    • 65

    Mostly Cloudy

    • 51
    • 65

    Partly Sunny

Today 21 Sep Island County

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

Tonight 21 Sep Island County

Mostly clear in the evening then becoming mostly cloudy. Lows in the lower to mid 50s. West wind 10 to 15 Mph.

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Lost Lake Temperature Statistics

September Temperature

Arlington Municipal Airport (14.9 miles)

  • Lowest 16 September, 2026

    44.1 °F

  • Average September

    59.5 °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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