Lost Lake Weather Forecast

    • 54
    • 72

    Mostly Cloudy

    • 53
    • 71

    Partly Sunny

    • 53
    • 76

    Mostly Sunny

    • 54
    • 77

    Mostly Sunny

    • 54
    • 76

    Partly Sunny

    • 54
    • 73

    Partly Sunny

Today 14 Sep Island County

Mostly cloudy until late afternoon then becoming mostly sunny. Areas of drizzle in the morning. Highs in the 60s. Southeast wind around 10 Mph becoming south to 10 Mph in the afternoon.

Tonight 14 Sep Island County

Partly cloudy in the evening then becoming mostly cloudy. Lows in the lower to mid 50s. West wind to 10 Mph.

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Lost Lake Temperature Statistics

September Temperature

Arlington Municipal Airport (14.9 miles)

  • Lowest 8 September, 2026

    46 °F

  • Average September

    60.4 °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

    42.6 °F

  • Average 2021–2026

    50.9 °F

  • Average High 2021–2026

    59.9 °F
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