Ginkgo Petrified Forest State Park Weather Forecast

    • 60
    • 85

    Mostly Sunny

    • 60
    • 87

    Sunny

    • 61
    • 86

    Partly Sunny

    • 51
    • 78

    Mostly Sunny

    • 55
    • 79

    Mostly Sunny

    • 60
    • 80

    Partly Sunny

Today 18 Sep Kittitas Valley

Sunny. Highs in the lower to mid 80s. Northwest wind 5 to 10 Mph. Gusts up to 20 Mph in the morning.

Tonight 18 Sep Kittitas Valley

Mostly clear. Lows in the 50s. Northwest wind 5 to 10 Mph.

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Ginkgo Petrified Forest State Park Temperature Statistics

September Temperature

Ellensburg, Ellensburg Bowers Field (24.9 miles)

  • Lowest 13 September, 2025

    48 °F

  • Average September

    69.6 °F

  • Highest 3 September, 2025

    99 °F

Climate (2020–Present)

Ellensburg, Ellensburg Bowers Field (24.9 miles)

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  • Average Low 2020–2025

    40.4 °F

  • Average 2020–2025

    51.5 °F

  • Average High 2020–2025

    62.9 °F
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