Chehalis Weather Forecast

    • 51
    • 79

    Increasing Clouds

    • 55
    • 80

    Partly Sunny

    • 52
    • 76

    Mostly Cloudy

    • 53
    • 84

    Mostly Sunny

    • 54
    • 85

    Partly Sunny

    • 53
    • 84

    Mostly Cloudy

    • 53
    • 83

    Mostly Cloudy

Today 10 Aug Lowlands of Lewis and Southern Thurston Counties

Mostly cloudy in the morning then becoming mostly sunny. Patchy fog in the morning. Highs in the mid 70s to lower 80s. Light wind.

Tonight 10 Aug Lowlands of Lewis and Southern Thurston Counties

Mostly clear. Lows near 50. 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

    66.5 °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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