Lost Lake Weather Forecast

    • 50
    • 70

    Partly Sunny

    • 53
    • 79

    Partly Sunny

    • 53
    • 82

    Partly Sunny

    • 48
    • 66

    Mostly Cloudy

Today 26 May Island County

Mostly cloudy with a slight chance of Showers in the Morning, then mostly sunny in the afternoon. Highs in the 60s. West wind to 10 Mph becoming northwest around 10 Mph in the afternoon.

Tonight 26 May Island County

Mostly clear. Lows near 50. Northwest wind to 10 Mph in the evening becoming light.

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Lost Lake Temperature Statistics

May Temperature

Arlington Municipal Airport (14.9 miles)

  • Lowest 18 May, 2026

    42.1 °F

  • Average May

    56.6 °F

  • Highest 12 May, 2026

    84 °F

Climate (2021–Present)

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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