Chehalis Weather Forecast

    • 55
    • 81

    Gradual Clearing

    • 57
    • 86

    Partly Sunny

    • 57
    • 84

    Chance Rain

    • 56
    • 71

    Slight Chance Rain

    • 54
    • 76

    Partly Sunny

    • 54
    • 81

    Partly Sunny

Today 19 Aug Lowlands of Lewis and Southern Thurston Counties

Cloudy in the morning then becoming mostly sunny. Highs in the upper 70s to mid 80s. Light wind.

Tonight 19 Aug Lowlands of Lewis and Southern Thurston Counties

Partly cloudy. Lows in the lower to mid 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

    65.4 °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

    43.6 °F

  • Average 2021–2026

    52 °F

  • Average High 2021–2026

    61.3 °F
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