Lost Lake Weather Forecast

    • 59
    • 85

    Increasing Clouds

    • 57
    • 74

    Rain Showers Likely

    • 56
    • 77

    Mostly Cloudy

    • 56
    • 79

    Partly Sunny

    • 56
    • 78

    Partly Sunny

    • 55
    • 74

    Mostly Cloudy

Today 21 Aug Island County

Mostly sunny in the morning then becoming mostly cloudy. Highs in the 70s. Northwest wind 10 to 15 Mph.

Tonight 21 Aug Island County

Cloudy. A slight chance of Showers in the morning. Lows in the mid 50s to lower 60s. West wind around 10 Mph becoming southwest after midnight.

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Lost Lake Temperature Statistics

August Temperature

Arlington Municipal Airport (14.9 miles)

  • Lowest 3 August, 2026

    46.4 °F

  • Average August

    64.3 °F

  • Highest 6 August, 2026

    84.9 °F

Climate (2021–2026)

Arlington Municipal Airport (14.9 miles)

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  • Average Low 2021–2026

    42.5 °F

  • Average 2021–2026

    50.9 °F

  • Average High 2021–2026

    59.9 °F
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