Lost Lake Weather Forecast

    • 54
    • 76

    Mostly Sunny

    • 53
    • 77

    Partly Sunny

    • 53
    • 72

    Partly Sunny

    • 53
    • 69

    Partly Sunny

    • 54
    • 72

    Mostly Cloudy

    • 53
    • 68

    Partly Sunny

Today 17 Sep Island County

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

Tonight 17 Sep Island County

Mostly clear. Lows in the upper 40s to mid 50s. Northwest wind to 10 Mph becoming southeast 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 °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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