Chehalis Weather Forecast

    • 39
    • 62

    Increasing Clouds

    • 38
    • 62

    Mostly Cloudy

    • 37
    • 64

    Mostly Sunny

    • 38
    • 68

    Partly Sunny

    • 38
    • 62

    Slight Chance Rain

    • 36
    • 61

    Mostly Cloudy

Today 18 Oct Lowlands of Lewis and Southern Thurston Counties

Sunny. Patchy fog in the morning. Highs in the lower 60s. Light wind becoming north to 10 Mph in the afternoon.

Tonight 18 Oct Lowlands of Lewis and Southern Thurston Counties

Mostly cloudy. Areas of fog in the morning. Lows in the mid 30s to lower 40s. Light wind.

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Chehalis Temperature Statistics

October Temperature

Chehalis-Centralia Airport (1.2 miles)

  • Lowest 11 October, 2026

    35.6 °F

  • Average October

    55.6 °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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