Chehalis Weather Forecast

    • 36
    • 70

    Increasing Clouds

    • 34
    • 62

    Mostly Cloudy

    • 34
    • 60

    Partly Sunny

    • 36
    • 57

    Chance Rain

    • 35
    • 60

    Chance Rain

    • 35
    • 61

    Partly Sunny

Today 21 Oct Lowlands of Lewis and Southern Thurston Counties

Sunny. Patchy fog and frost in the morning. Highs in the mid 60s to lower 70s. Light wind.

Tonight 21 Oct Lowlands of Lewis and Southern Thurston Counties

Partly cloudy. Lows in the mid to upper 30s. Northwest wind to 10 Mph in the evening becoming light.

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Chehalis Temperature Statistics

October Temperature

Chehalis-Centralia Airport (1.2 miles)

  • Lowest 11 October, 2026

    35.6 °F

  • Average October

    54.9 °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

    52.1 °F

  • Average High 2021–2026

    61.4 °F
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