Lost Lake Weather Forecast

    • 58
    • 83

    Increasing Clouds

    • 55
    • 71

    Rain

    • 54
    • 72

    Partly Sunny

    • 56
    • 75

    Mostly Sunny

    • 58
    • 81

    Mostly Sunny

    • 58
    • 81

    Mostly Sunny

    • 58
    • 80

    Mostly Sunny

Today 31 Jul Island County

Sunny. Highs in the 70s. Light wind becoming northwest to 10 Mph in the afternoon.

Tonight 31 Jul Island County

Mostly clear. Lows in the mid to upper 50s. West wind around 10 Mph becoming southwest to 10 Mph after midnight.

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Lost Lake Temperature Statistics

July Temperature

Arlington Municipal Airport (14.9 miles)

  • Lowest 13 July, 2026

    44.6 °F

  • Average July

    64.1 °F

  • Highest 22 July, 2026

    93 °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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