Chehalis Weather Forecast

    • 42
    • 67

    Increasing Clouds

    • 44
    • 69

    Gradual Clearing

    • 45
    • 69

    Mostly Cloudy

    • 46
    • 74

    Partly Sunny

    • 47
    • 76

    Partly Sunny

    • 45
    • 73

    Partly Sunny

    • 44
    • 71

    Partly Sunny

Today 17 May Lowlands of Lewis and Southern Thurston Counties

Mostly sunny. Patchy fog in the morning. Highs in the 60s. Light wind.

Tonight 17 May Lowlands of Lewis and Southern Thurston Counties

Partly cloudy in the evening then becoming mostly cloudy. Lows in the lower to mid 40s. Northwest wind to 10 Mph in the evening becoming light.

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  • Temperature Real-Time

Chehalis Temperature Statistics

May Temperature

Chehalis-Centralia Airport (1.2 miles)

  • Lowest 15 May, 2026

    42.8 °F

  • Average May

    58.3 °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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