Chehalis Weather Forecast

    • 32
    • 55

    Mostly Cloudy

    • 31
    • 56

    Mostly Cloudy

    • 39
    • 55

    Mostly Cloudy

    • 37
    • 59

    Mostly Cloudy

    • 43
    • 59

    Chance Rain

    • 43
    • 58

    Rain Likely

    • 40
    • 58

    Chance Rain

Today 31 Oct Lowlands of Lewis and Southern Thurston Counties

Cloudy with a chance of rain. Highs in the upper 50s.

Tonight 31 Oct Lowlands of Lewis and Southern Thurston Counties

Mostly cloudy in the evening then becoming partly cloudy. Patchy dense fog and frost after midnight. Lows in the upper 20s to mid 30s. Light wind.

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Chehalis Temperature Statistics

October Temperature

Chehalis-Centralia Airport (1.2 miles)

  • Lowest 24 October, 2026

    32 °F

  • Average October

    53 °F

  • Highest 16 October, 2026

    80.6 °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

    61.4 °F
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