Lost Lake Weather Forecast

    • 54
    • 72

    Becoming Sunny

    • 58
    • 84

    Mostly Sunny

    • 54
    • 75

    Partly Sunny

    • 54
    • 73

    Mostly Sunny

    • 55
    • 75

    Mostly Sunny

    • 56
    • 75

    Chance Rain

Today 15 Sep Island County

Partly sunny in the morning then becoming sunny. Highs in the 60s. Light wind becoming northwest to 10 Mph in the afternoon.

Tonight 15 Sep Island County

Mostly clear. Lows in the lower to mid 50s. Northwest wind to 10 Mph.

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Lost Lake Temperature Statistics

September Temperature

Arlington Municipal Airport (14.9 miles)

  • Lowest 9 September, 2025

    51.8 °F

  • Average September

    63.3 °F

  • Highest 3 September, 2025

    81 °F

Climate (2020–Present)

Arlington Municipal Airport (14.9 miles)

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  • Average Low 2020–2025

    42.4 °F

  • Average 2020–2025

    50.6 °F

  • Average High 2020–2025

    59.7 °F
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