Chehalis Weather Forecast

    • 52
    • 71

    Increasing Clouds

    • 48
    • 71

    Increasing Clouds

    • 49
    • 72

    Mostly Sunny

    • 50
    • 76

    Mostly Sunny

    • 45
    • 69

    Mostly Cloudy

    • 41
    • 63

    Partly Sunny

    • 40
    • 65

    Mostly Sunny

Today 5 Oct Lowlands of Lewis and Southern Thurston Counties

Partly sunny. Areas of fog in the Morning, then patchy fog early in the afternoon. Highs near 70. Light wind.

Tonight 5 Oct Lowlands of Lewis and Southern Thurston Counties

Partly cloudy until early morning then becoming mostly cloudy. Patchy fog late in the evening. Areas of fog after midnight. Lows near 50. Light wind.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Chehalis Temperature Statistics

October Temperature

Chehalis-Centralia Airport (1.2 miles)

  • Lowest 1 October, 2026

    46.4 °F

  • Average October

    58.9 °F

  • Highest 1 October, 2026

    71.6 °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

    61.3 °F
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