Lost Lake Weather Forecast

    • 44
    • 60

    Decreasing Clouds

    • 44
    • 60

    Mostly Sunny

    • 44
    • 62

    Partly Sunny

    • 45
    • 58

    Chance Rain Showers

    • 43
    • 56

    Mostly Cloudy

    • 44
    • 56

    Mostly Cloudy

Today 19 Oct Island County

Mostly cloudy until late afternoon then becoming mostly sunny. Highs in the mid 50s to lower 60s. Light wind.

Tonight 19 Oct Island County

Partly cloudy. Lows in the 40s. Northwest wind to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lost Lake Temperature Statistics

October Temperature

Arlington Municipal Airport (14.9 miles)

  • Lowest 12 October, 2026

    32 °F

  • Average October

    54 °F

  • Highest 16 October, 2026

    78.1 °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

    60 °F
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