Lost Lake Weather Forecast

    • 47
    • 66

    Increasing Clouds

    • 42
    • 51

    Rain Showers Likely

    • 49
    • 59

    Mostly Sunny

    • 51
    • 61

    Sunny

    • 44
    • 59

    Partly Sunny

    • 44
    • 53

    Slight Chance Rain Showers

    • 48
    • 57

    Partly Sunny

Today 13 Sep Western Chelan County

Sunny, haze. Highs in the upper 70s to upper 80s.

Tonight 13 Sep Western Chelan County

Partly cloudy. Lows in the lower 50s to lower 60s.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lost Lake Temperature Statistics

September Temperature

Stampede Pass (41.6 miles)

  • Lowest 8 September, 2025

    50 °F
  • Average September

    61.6 °F
  • Highest 2 September, 2025

    87.1 °F

Climate (2020–Present)

Stampede Pass (41.6 miles)

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  • Average Low 2020–2025

    36.3 °F
  • Average 2020–2025

    41.6 °F
  • Average High 2020–2025

    48.3 °F
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