Chehalis Weather Forecast

    • 49
    • 76

    Chance Rain

    • 35
    • 65

    Slight Chance Rain

    • 37
    • 62

    Mostly Cloudy

    • 36
    • 60

    Slight Chance Rain

    • 35
    • 62

    Partly Sunny

    • 37
    • 64

    Partly Sunny

Today 16 Oct Lowlands of Lewis and Southern Thurston Counties

Mostly sunny. Highs in the 70s. South wind to 10 Mph becoming southwest in the afternoon.

Tonight 16 Oct Lowlands of Lewis and Southern Thurston Counties

Mostly clear in the Evening, then mostly cloudy with a slight chance of rain after midnight. Mostly cloudy with a chance of rain in the morning. Lows in the mid 40s to lower 50s. West wind to 10 Mph becoming south after midnight.

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Chehalis Temperature Statistics

October Temperature

Chehalis-Centralia Airport (1.2 miles)

  • Lowest 11 October, 2026

    35.6 °F

  • Average October

    55.5 °F

  • Highest 4 October, 2026

    73.4 °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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