Chehalis Weather Forecast

    • 40
    • 63

    Gradual Clearing

    • 39
    • 65

    Partly Sunny

    • 41
    • 72

    Mostly Sunny

    • 50
    • 80

    Mostly Sunny

    • 54
    • 89

    Partly Sunny

    • 50
    • 78

    Mostly Cloudy

Today 29 May Lowlands of Lewis and Southern Thurston Counties

Cloudy until late afternoon then becoming partly sunny. Highs in the lower to mid 60s. West wind 10 to 15 Mph with Gusts to 30 Mph.

Tonight 29 May Lowlands of Lewis and Southern Thurston Counties

Partly cloudy. Lows near 40. West wind 10 to 15 Mph becoming southwest after midnight. Gusts to 30 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Chehalis Temperature Statistics

May Temperature

Chehalis-Centralia Airport (1.2 miles)

  • Lowest 17 May, 2026

    35.6 °F

  • Average May

    57.3 °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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