Ginkgo Petrified Forest State Park Weather Forecast

    • 56
    • 79

    Mostly Sunny

    • 55
    • 77

    Mostly Sunny

    • 57
    • 77

    Mostly Sunny

    • 58
    • 79

    Mostly Sunny

    • 56
    • 82

    Mostly Sunny

    • 53
    • 77

    Partly Sunny

Today 17 Sep Kittitas Valley

Sunny. Highs in the mid to upper 70s. Light wind.

Tonight 17 Sep Kittitas Valley

Mostly clear. Lows in the lower to mid 50s. Light wind.

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Ginkgo Petrified Forest State Park Temperature Statistics

September Temperature

Ellensburg, Ellensburg Bowers Field (24.9 miles)

  • Lowest 3 September, 2026

    40.6 °F

  • Average September

    58.5 °F

  • Highest 1 September, 2026

    83.6 °F

Climate (2021–2026)

Ellensburg, Ellensburg Bowers Field (24.9 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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