Chester Morse Lake Weather Forecast

    • 43
    • 55

    Increasing Clouds

    • 42
    • 56

    Slight Chance Rain

    • 46
    • 67

    Sunny

    • 47
    • 70

    Mostly Sunny

    • 47
    • 68

    Mostly Sunny

    • 45
    • 65

    Partly Sunny

Today 14 Sep Cascades of Southern King County

Mostly cloudy. Freezing level near 11500 feet. Afternoon pass Temperatures in the lower 50s. Light wind in the Passes.

Tonight 14 Sep Cascades of Southern King County

Mostly cloudy. Freezing level near 11500 feet. Light wind in the Passes.

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Chester Morse Lake Temperature Statistics

September Temperature

Ellensburg, Ellensburg Bowers Field (59.7 miles)

  • Lowest 3 September, 2026

    40.6 °F

  • Average September

    59.3 °F

  • Highest 1 September, 2026

    83.6 °F

Climate (2021–2026)

Ellensburg, Ellensburg Bowers Field (59.7 miles)

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  • Average Low 2021–2026

    40 °F

  • Average 2021–2026

    51.2 °F

  • Average High 2021–2026

    62.5 °F
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