Chehalis Weather Forecast

    • 53
    • 83

    Decreasing Clouds

    • 54
    • 80

    Mostly Cloudy

    • 53
    • 80

    Mostly Cloudy

    • 55
    • 85

    Partly Sunny

    • 55
    • 79

    Chance Rain

    • 54
    • 75

    Chance Rain

Today 17 Aug Lowlands of Lewis and Southern Thurston Counties

Mostly cloudy in the morning then becoming mostly sunny. Patchy fog in the morning. Highs in the lower to mid 80s. Light wind.

Tonight 17 Aug Lowlands of Lewis and Southern Thurston Counties

Mostly clear. 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

    65.6 °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

    43.6 °F

  • Average 2021–2026

    52 °F

  • Average High 2021–2026

    61.3 °F
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