Chehalis Weather Forecast

    • 42
    • 72

    Mostly Sunny

    • 52
    • 81

    Mostly Sunny

    • 55
    • 89

    Partly Sunny

    • 50
    • 76

    Mostly Cloudy

    • 45
    • 69

    Partly Sunny

    • 46
    • 65

    Chance Rain

    • 44
    • 62

    Rain Likely

Today 31 May Lowlands of Lewis and Southern Thurston Counties

Sunny. Highs near 70. Light wind.

Tonight 31 May Lowlands of Lewis and Southern Thurston Counties

Mostly clear. Lows in the lower to mid 40s. North wind to 10 Mph with Gusts to 20 Mph in the evening becoming light.

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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

    57.4 °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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