Chehalis Weather Forecast

    • 45
    • 66

    Decreasing Clouds

    • 49
    • 76

    Partly Sunny

    • 49
    • 79

    Partly Sunny

    • 41
    • 64

    Partly Sunny

    • 40
    • 65

    Partly Sunny

    • 42
    • 69

    Partly Sunny

Today 26 May Lowlands of Lewis and Southern Thurston Counties

Partly sunny. Areas of fog in the morning. A slight chance of Showers late in the afternoon. Highs in the 60s. Light wind.

Tonight 26 May Lowlands of Lewis and Southern Thurston Counties

Partly cloudy. Lows in the lower to mid 40s. Light wind.

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Chehalis Temperature Statistics

May Temperature

Chehalis-Centralia Airport (1.2 miles)

  • Lowest 17 May, 2026

    35.6 °F

  • Average May

    57.5 °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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