Chehalis Weather Forecast

    • 51
    • 79

    Mostly Sunny

    • 55
    • 85

    Increasing Clouds

    • 60
    • 89

    Mostly Cloudy

    • 60
    • 93

    Partly Sunny

    • 59
    • 92

    Partly Sunny

    • 56
    • 86

    Partly Sunny

    • 54
    • 80

    Partly Sunny

Today 18 Jul Lowlands of Lewis and Southern Thurston Counties

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

Tonight 18 Jul Lowlands of Lewis and Southern Thurston Counties

Mostly clear. Patchy fog late in the night. Lows near 50. Northwest wind to 10 Mph in the evening becoming light.

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Chehalis Temperature Statistics

July Temperature

Chehalis-Centralia Airport (1.2 miles)

  • Lowest 9 July, 2026

    46.4 °F

  • Average July

    62.9 °F

  • Highest 6 July, 2026

    86 °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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