Chehalis Weather Forecast

    • 49
    • 83

    Becoming Sunny

    • 50
    • 79

    Increasing Clouds

    • 50
    • 80

    Partly Sunny

    • 54
    • 80

    Partly Sunny

    • 53
    • 80

    Partly Sunny

    • 56
    • 86

    Mostly Sunny

    • 56
    • 88

    Partly Sunny

Today 8 Aug Lowlands of Lewis and Southern Thurston Counties

Mostly cloudy in the morning then becoming sunny. Patchy fog in the morning. Highs in the upper 70s to mid 80s. Light wind becoming west to 10 Mph with Gusts to 20 Mph in the afternoon.

Tonight 8 Aug Lowlands of Lewis and Southern Thurston Counties

Mostly clear. Patchy fog late in the night. Lows in the mid 40s to lower 50s. West wind to 10 Mph with Gusts to 20 Mph becoming south after midnight.

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Chehalis Temperature Statistics

August Temperature

Chehalis-Centralia Airport (1.2 miles)

  • Lowest 3 August, 2026

    48.2 °F

  • Average August

    66.2 °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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