Chehalis Weather Forecast

    • 53
    • 80

    Decreasing Clouds

    • 54
    • 83

    Mostly Cloudy

    • 54
    • 80

    Partly Sunny

    • 54
    • 78

    Mostly Cloudy

    • 54
    • 83

    Partly Sunny

    • 55
    • 81

    Mostly Cloudy

Today 16 Aug Lowlands of Lewis and Southern Thurston Counties

Cloudy in the morning then becoming mostly sunny. Areas of fog in the Morning, then patchy fog late in the morning. Highs near 80. Light wind.

Tonight 16 Aug Lowlands of Lewis and Southern Thurston Counties

Mostly cloudy. Patchy fog after midnight. 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

    65.8 °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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