Chehalis Weather Forecast

    • 50
    • 83

    Increasing Clouds

    • 40
    • 63

    Mostly Cloudy

    • 39
    • 65

    Partly Sunny

    • 42
    • 71

    Mostly Sunny

    • 50
    • 80

    Mostly Sunny

    • 54
    • 88

    Partly Sunny

Today 28 May Lowlands of Lewis and Southern Thurston Counties

Sunny. Highs in the upper 70s to mid 80s. Light wind becoming northwest to 10 Mph with Gusts to 20 Mph in the afternoon.

Tonight 28 May Lowlands of Lewis and Southern Thurston Counties

Partly cloudy in the Evening, then mostly cloudy with a slight chance of Showers after midnight. Mostly cloudy in the morning. Lows near 50. West wind 10 to 15 Mph becoming southwest after midnight. Gusts to 30 Mph.

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Chehalis Temperature Statistics

May Temperature

Chehalis-Centralia Airport (1.2 miles)

  • Lowest 17 May, 2026

    35.6 °F

  • Average May

    57.2 °F

  • Highest 3 May, 2026

    84.2 °F

Climate (2021–Present)

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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