Lost Lake Weather Forecast

    • 57
    • 83

    Increasing Clouds

    • 56
    • 81

    Mostly Cloudy

    • 57
    • 82

    Partly Sunny

    • 57
    • 82

    Mostly Cloudy

    • 57
    • 74

    Chance Rain

    • 56
    • 74

    Mostly Cloudy

Today 18 Aug Island County

Mostly cloudy in the morning then becoming mostly sunny. Patchy fog until late afternoon. Highs in the upper 60s to mid 70s. South wind to 10 Mph becoming west in the afternoon.

Tonight 18 Aug Island County

Mostly clear in the evening then becoming mostly cloudy. Lows in the 50s. Light wind.

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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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