Lake Valhalla Weather Forecast

    • 48
    • 66

    Decreasing Clouds

    • 47
    • 73

    Mostly Sunny

    • 47
    • 65

    Rain Showers Likely

    • 42
    • 54

    Mostly Cloudy

    • 47
    • 63

    Partly Sunny

    • 50
    • 67

    Chance Rain Showers

Today 18 Sep Western Chelan County

Partly cloudy. Highs in the mid 70s to mid 80s.

Tonight 18 Sep Western Chelan County

Mostly clear. Lows in the lower 50s to lower 60s.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Valhalla Temperature Statistics

September Temperature

Stampede Pass (37.3 miles)

  • Lowest 15 September, 2025

    39.9 °F

  • Average September

    59.2 °F

  • Highest 2 September, 2025

    87.1 °F

Climate (2020–Present)

Stampede Pass (37.3 miles)

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  • Average Low 2020–2025

    36.3 °F

  • Average 2020–2025

    41.5 °F

  • Average High 2020–2025

    48.3 °F
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