Lost Lake Weather Forecast

    • 56
    • 79

    Increasing Clouds

    • 56
    • 80

    Partly Sunny

    • 57
    • 81

    Mostly Sunny

    • 56
    • 80

    Partly Sunny

    • 55
    • 77

    Partly Sunny

    • 55
    • 76

    Partly Sunny

    • 55
    • 77

    Mostly Sunny

Today 21 Jul Island County

Mostly sunny. Highs in the upper 60s to mid 70s. Light wind.

Tonight 21 Jul Island County

Partly cloudy. Lows in the 50s. West wind to 10 Mph becoming southwest after midnight.

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Lost Lake Temperature Statistics

July Temperature

Arlington Municipal Airport (14.9 miles)

  • Lowest 4 July, 2025

    46 °F
  • Average July

    64.9 °F
  • Highest 16 July, 2025

    91 °F

Climate (2020–Present)

Arlington Municipal Airport (14.9 miles)

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  • Average Low 2020–2025

    42.3 °F
  • Average 2020–2025

    50.5 °F
  • Average High 2020–2025

    59.7 °F
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