Lost Lake Weather Forecast

    • 57
    • 84

    Partly Sunny

    • 60
    • 84

    Mostly Cloudy

    • 57
    • 77

    Chance Rain

    • 56
    • 77

    Partly Sunny

    • 56
    • 76

    Mostly Cloudy

    • 56
    • 76

    Partly Sunny

Today 20 Aug Island County

Sunny. Highs in the 70s. Northwest wind to 10 Mph increasing to 10 to 15 Mph in the afternoon.

Tonight 20 Aug Island County

Mostly clear. Lows in the 50s. Northwest wind 10 to 15 Mph becoming north 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

    64.2 °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

    50.8 °F

  • Average High 2021–2026

    59.8 °F
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