Lost Lake Weather Forecast

    • 41
    • 48

    Increasing Clouds

    • 39
    • 48

    Chance Rain Showers

    • 45
    • 59

    Sunny

    • 48
    • 64

    Mostly Sunny

    • 46
    • 63

    Mostly Sunny

    • 44
    • 60

    Mostly Sunny

Today 14 Sep Western Chelan County

Mostly cloudy in the Morning, becoming partly cloudy. Patchy fog in the morning. Highs in the lower 60s to lower 70s. Gusts up to 30 Mph decreasing to 20 Mph in the afternoon.

Tonight 14 Sep Western Chelan County

Mostly cloudy. Lows in the mid 40s to mid 50s.

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Lost Lake Temperature Statistics

September Temperature

Stampede Pass (41.6 miles)

  • Lowest 3 September, 2026

    39.9 °F

  • Average September

    51.2 °F

  • Highest 9 September, 2026

    71.1 °F

Climate (2021–2026)

Stampede Pass (41.6 miles)

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  • Average Low 2021–2026

    36.1 °F

  • Average 2021–2026

    41.5 °F

  • Average High 2021–2026

    48.2 °F
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