Lost Lake Weather Forecast

    • 55
    • 79

    Becoming Sunny

    • 57
    • 81

    Partly Sunny

    • 58
    • 87

    Partly Sunny

    • 56
    • 80

    Mostly Cloudy

    • 55
    • 74

    Mostly Cloudy

    • 54
    • 73

    Partly Sunny

Today 23 Aug Island County

Cloudy with a slight chance of Thunderstorms in the Morning, then partly sunny in the afternoon. Highs in the upper 60s to mid 70s. South wind around 10 Mph.

Tonight 23 Aug Island County

Partly cloudy. Lows in the lower to mid 50s. West wind 10 to 15 Mph becoming northwest 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

    64.7 °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

    42.5 °F

  • Average 2021–2026

    50.9 °F

  • Average High 2021–2026

    59.9 °F
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