Chehalis Weather Forecast

    • 51
    • 71

    Gradual Clearing

    • 53
    • 78

    Partly Sunny

    • 54
    • 71

    Chance Rain

    • 51
    • 66

    Rain

    • 50
    • 66

    Rain Showers Likely

    • 50
    • 70

    Chance Rain

Today 30 Aug Lowlands of Lewis and Southern Thurston Counties

Cloudy until late afternoon then becoming mostly sunny. Patchy fog in the morning. Highs in the lower 70s. Light wind.

Tonight 30 Aug Lowlands of Lewis and Southern Thurston Counties

Mostly clear. Lows in the mid 40s to lower 50s. Light wind.

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Chehalis Temperature Statistics

August Temperature

Chehalis-Centralia Airport (1.2 miles)

  • Lowest 3 August, 2026

    48.2 °F

  • Average August

    65.6 °F

  • Highest 5 August, 2026

    89.6 °F

Climate (2021–2026)

Chehalis-Centralia Airport (1.2 miles)

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  • Average Low 2021–2026

    43.7 °F

  • Average 2021–2026

    52 °F

  • Average High 2021–2026

    61.3 °F
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