Chehalis Weather Forecast

    • 55
    • 80

    Gradual Clearing

    • 54
    • 73

    Mostly Cloudy

    • 52
    • 72

    Mostly Cloudy

    • 48
    • 71

    Partly Sunny

    • 50
    • 75

    Partly Sunny

    • 52
    • 72

    Chance Rain

Today 26 Aug Lowlands of Lewis and Southern Thurston Counties

Cloudy in the morning then becoming mostly sunny. Highs near 80. Light wind.

Tonight 26 Aug Lowlands of Lewis and Southern Thurston Counties

Mostly clear in the evening then becoming mostly cloudy. Lows in the lower to mid 50s. West wind to 10 Mph in the evening becoming light.

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Chehalis Temperature Statistics

August Temperature

Chehalis-Centralia Airport (1.2 miles)

  • Lowest 3 August, 2026

    48.2 °F

  • Average August

    65.9 °F

  • Highest 5 August, 2026

    89.6 °F

Climate (2021–2026)

Chehalis-Centralia Airport (1.2 miles)

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  • Average Low 2021–2026

    43.7 °F

  • Average 2021–2026

    52 °F

  • Average High 2021–2026

    61.3 °F
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