Chehalis Weather Forecast

    • 48
    • 80

    Mostly Sunny

    • 48
    • 78

    Mostly Sunny

    • 44
    • 74

    Partly Sunny

    • 45
    • 69

    Rain Likely

    • 42
    • 58

    Rain

    • 44
    • 67

    Chance Rain

Today 21 May Lowlands of Lewis and Southern Thurston Counties

Sunny. Patchy fog in the morning. Highs in the mid 70s to lower 80s. Light wind.

Tonight 21 May Lowlands of Lewis and Southern Thurston Counties

Mostly clear. Patchy fog in the morning. Lows in the mid to upper 40s. Light wind.

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  • Temperature Real-Time

Chehalis Temperature Statistics

May Temperature

Chehalis-Centralia Airport (1.2 miles)

  • Lowest 17 May, 2026

    35.6 °F

  • Average May

    57.1 °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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