Lost Lake Weather Forecast

    • 54
    • 76

    Mostly Sunny

    • 53
    • 76

    Mostly Sunny

    • 53
    • 77

    Partly Sunny

    • 53
    • 72

    Partly Sunny

    • 53
    • 70

    Partly Sunny

    • 54
    • 71

    Mostly Cloudy

Today 16 Sep Island County

Sunny. Highs in the mid 60s to lower 70s. Northwest wind to 10 Mph increasing to 10 to 15 Mph in the afternoon.

Tonight 16 Sep Island County

Mostly clear. Lows in the upper 40s to mid 50s. Northwest wind 10 to 15 Mph decreasing to 10 Mph or less after midnight.

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Lost Lake Temperature Statistics

September Temperature

Arlington Municipal Airport (14.9 miles)

  • Lowest 8 September, 2026

    46 °F

  • Average September

    60.1 °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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