Chehalis Weather Forecast

    • 53
    • 77

    Increasing Clouds

    • 54
    • 85

    Becoming Sunny

    • 53
    • 82

    Partly Sunny

    • 52
    • 83

    Partly Sunny

    • 54
    • 85

    Mostly Cloudy

    • 54
    • 83

    Mostly Cloudy

    • 54
    • 79

    Mostly Cloudy

Today 12 Aug Lowlands of Lewis and Southern Thurston Counties

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

Tonight 12 Aug Lowlands of Lewis and Southern Thurston Counties

Partly cloudy. Lows in the upper 40s 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

    65.9 °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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