Chehalis Weather Forecast

    • 50
    • 74

    Mostly Sunny

    • 49
    • 73

    Mostly Sunny

    • 50
    • 71

    Partly Sunny

    • 47
    • 71

    Partly Sunny

    • 48
    • 72

    Mostly Sunny

    • 49
    • 74

    Partly Sunny

    • 45
    • 66

    Mostly Cloudy

Today 3 Oct Lowlands of Lewis and Southern Thurston Counties

Partly sunny with a slight chance of rain. Highs in the lower 60s.

Tonight 3 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

    57.1 °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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