Lost Lake Weather Forecast

    • 49
    • 63

    Increasing Clouds

    • 50
    • 65

    Mostly Cloudy

    • 52
    • 70

    Partly Sunny

    • 53
    • 68

    Mostly Sunny

    • 52
    • 67

    Partly Sunny

    • 53
    • 67

    Partly Sunny

    • 52
    • 64

    Partly Sunny

Today 30 Sep Island County

Partly sunny. Highs in the lower to mid 60s.

Tonight 30 Sep Island County

Mostly cloudy. Lows in the mid 40s to lower 50s. Northwest wind to 10 Mph in the evening becoming light.

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Lost Lake Temperature Statistics

September Temperature

Arlington Municipal Airport (14.9 miles)

  • Lowest 27 September, 2026

    39 °F

  • Average September

    57.9 °F

  • Highest 9 September, 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

    59.9 °F
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