Chehalis Weather Forecast

    • 45
    • 69

    Mostly Cloudy

    • 44
    • 71

    Mostly Cloudy

    • 48
    • 67

    Mostly Cloudy

    • 47
    • 76

    Partly Sunny

    • 46
    • 76

    Partly Sunny

    • 46
    • 77

    Partly Sunny

Today 6 May Lowlands of Lewis and Southern Thurston Counties

Partly sunny. Patchy fog in the morning. Highs in the mid 60s to lower 70s. Southwest wind to 10 Mph becoming west with Gusts to 25 Mph in the afternoon.

Tonight 6 May Lowlands of Lewis and Southern Thurston Counties

Mostly cloudy. Lows in the lower to mid 40s. West wind 10 to 15 Mph becoming southwest after midnight. Gusts to 25 Mph.

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Chehalis Temperature Statistics

May Temperature

Chehalis-Centralia Airport (1.2 miles)

  • Lowest 1 May, 2026

    44.6 °F

  • Average May

    64.6 °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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