Lost Lake Weather Forecast

    • 56
    • 83

    Gradual Clearing

    • 55
    • 77

    Partly Sunny

    • 56
    • 79

    Partly Sunny

    • 57
    • 78

    Partly Sunny

    • 58
    • 77

    Partly Sunny

    • 59
    • 81

    Mostly Sunny

    • 60
    • 83

    Partly Sunny

Today 8 Aug Island County

Mostly cloudy until late afternoon then becoming sunny. Highs in the 70s. Southwest wind to 10 Mph becoming west in the afternoon.

Tonight 8 Aug Island County

Mostly clear. Lows in the 50s. West wind 10 to 15 Mph with Gusts to 25 Mph.

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  • Temperature Real-Time

Lost Lake Temperature Statistics

August Temperature

Arlington Municipal Airport (14.9 miles)

  • Lowest 3 August, 2026

    46.4 °F

  • Average August

    63.7 °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

    42.6 °F

  • Average 2021–2026

    50.9 °F

  • Average High 2021–2026

    59.9 °F
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