Chehalis Weather Forecast

    • 48
    • 78

    Increasing Clouds

    • 43
    • 73

    Mostly Cloudy

    • 49
    • 76

    Rain Likely

    • 44
    • 60

    Rain

    • 44
    • 65

    Chance Rain

    • 45
    • 65

    Mostly Cloudy

Today 22 May Lowlands of Lewis and Southern Thurston Counties

Mostly clear. Patchy fog in the morning. Highs in the mid to upper 70s. Light wind becoming north to 10 Mph in the afternoon.

Tonight 22 May Lowlands of Lewis and Southern Thurston Counties

Partly cloudy in the evening then becoming mostly cloudy. Patchy fog in the morning. Lows in the mid 40s to lower 50s. Northwest wind to 10 Mph with Gusts to 20 Mph becoming west after midnight.

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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

    57.1 °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

    43.8 °F

  • Average 2021–2026

    52.1 °F

  • Average High 2021–2026

    61.4 °F
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