Lost Lake Weather Forecast

    • 48
    • 69

    Mostly Cloudy

    • 50
    • 70

    Partly Sunny

    • 50
    • 71

    Mostly Cloudy

    • 51
    • 73

    Partly Sunny

    • 52
    • 74

    Partly Sunny

    • 52
    • 76

    Partly Sunny

Today 17 May Island County

Partly sunny in the morning then becoming sunny. Highs in the upper 50s to mid 60s. South wind to 10 Mph becoming west in the afternoon.

Tonight 17 May Island County

Mostly cloudy. Lows in the mid to upper 40s. West wind to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lost Lake Temperature Statistics

May Temperature

Arlington Municipal Airport (14.9 miles)

  • Lowest 12 May, 2026

    44.6 °F

  • Average May

    58.2 °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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