Chehalis Weather Forecast

    • 52
    • 86

    Increasing Clouds

    • 50
    • 83

    Partly Sunny

    • 50
    • 79

    Partly Sunny

    • 52
    • 82

    Partly Sunny

    • 54
    • 81

    Partly Sunny

    • 55
    • 81

    Partly Sunny

    • 57
    • 85

    Partly Sunny

Today 7 Aug Lowlands of Lewis and Southern Thurston Counties

Sunny. Highs in the 80s. Light wind becoming west to 10 Mph in the afternoon.

Tonight 7 Aug Lowlands of Lewis and Southern Thurston Counties

Mostly clear until early morning then becoming mostly cloudy. Patchy fog late in the night. 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

    65.5 °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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