Lewis and Clark State Park Weather Forecast

    • 52
    • 76

    Mostly Cloudy

    • 49
    • 78

    Partly Sunny

    • 51
    • 81

    Mostly Sunny

    • 54
    • 88

    Sunny

    • 52
    • 87

    Mostly Sunny

    • 51
    • 84

    Mostly Sunny

Today 19 Aug Foothills and Valleys of Thurston and Lewis Counties

Mostly sunny. Highs in the mid to upper 70s. Light wind.

Tonight 19 Aug Foothills and Valleys of Thurston and Lewis Counties

Mostly cloudy in the evening then becoming partly cloudy. Lows in the lower to mid 50s. Light wind.

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Lewis and Clark State Park Temperature Statistics

August Temperature

Chehalis-Centralia Airport (13 miles)

  • Lowest 8 August, 2025

    48.2 °F

  • Average August

    66.8 °F

  • Highest 12 August, 2025

    95 °F

Climate (2020–Present)

Chehalis-Centralia Airport (13 miles)

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  • Average Low 2020–2025

    43.6 °F

  • Average 2020–2025

    52 °F

  • Average High 2020–2025

    61.4 °F
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