Chehalis Weather Forecast

    • 34
    • 55

    Rain

    • 33
    • 54

    Rain Likely

    • 30
    • 54

    Chance Rain

    • 31
    • 55

    Slight Chance Rain

    • 31
    • 58

    Mostly Cloudy

    • 34
    • 58

    Mostly Cloudy

Today 28 Oct Lowlands of Lewis and Southern Thurston Counties

Showers likely in the Morning, then Showers and a slight chance of Thunderstorms in the afternoon. Rainfall Amounts less than a tenth of an inch Likely, except higher Amounts possible in Thunderstorms. Highs in the lower to mid 50s. South wind to 10 Mph becoming southwest around 10 Mph in the afternoon.

Tonight 28 Oct Lowlands of Lewis and Southern Thurston Counties

Mostly cloudy with a chance of Showers. Lows in the 30s. South wind to 10 Mph. Gusts to 20 Mph after midnight.

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Chehalis Temperature Statistics

October Temperature

Chehalis-Centralia Airport (1.2 miles)

  • Lowest 24 October, 2026

    32 °F

  • Average October

    53.5 °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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