Chehalis Weather Forecast

    • 37
    • 57

    Rain Showers

    • 42
    • 66

    Mostly Cloudy

    • 42
    • 69

    Partly Sunny

    • 43
    • 67

    Partly Sunny

    • 44
    • 70

    Partly Sunny

    • 45
    • 69

    Partly Sunny

Today 16 May Lowlands of Lewis and Southern Thurston Counties

Mostly cloudy with a chance of rain in the Morning, then Showers likely and a chance of Thunderstorms in the afternoon. Rainfall Amounts less than a tenth of an inch Likely, except higher Amounts possible in Thunderstorms. Highs in the 50s. Southwest wind to 10 Mph becoming west in the afternoon. Gusts to 25 Mph.

Tonight 16 May Lowlands of Lewis and Southern Thurston Counties

Mostly cloudy. A slight chance of rain in the evening. Lows in the mid to upper 30s. West wind 10 to 15 Mph becoming southwest after midnight. Gusts to 25 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Chehalis Temperature Statistics

May Temperature

Chehalis-Centralia Airport (1.2 miles)

  • Lowest 1 May, 2026

    44.6 °F

  • Average May

    59.6 °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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