Chehalis Weather Forecast

    • 49
    • 77

    Increasing Clouds

    • 50
    • 70

    Mostly Cloudy

    • 47
    • 71

    Partly Sunny

    • 48
    • 72

    Mostly Sunny

    • 49
    • 76

    Partly Sunny

    • 44
    • 67

    Mostly Cloudy

    • 41
    • 63

    Slight Chance Rain

Today 4 Oct Lowlands of Lewis and Southern Thurston Counties

Mostly sunny. Highs in the lower to mid 60s.

Tonight 4 Oct Lowlands of Lewis and Southern Thurston Counties

Mostly clear. Lows near 50. Light wind.

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Chehalis Temperature Statistics

October Temperature

Chehalis-Centralia Airport (1.2 miles)

  • Lowest 1 October, 2026

    46.4 °F

  • Average October

    58.7 °F

  • Highest 1 October, 2026

    71.6 °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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