Chehalis Weather Forecast

    • 50
    • 79

    Decreasing Clouds

    • 51
    • 79

    Mostly Sunny

    • 56
    • 86

    Mostly Sunny

    • 51
    • 72

    Partly Sunny

    • 51
    • 74

    Partly Sunny

    • 54
    • 83

    Mostly Sunny

Today 29 Jul Lowlands of Lewis and Southern Thurston Counties

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

Tonight 29 Jul Lowlands of Lewis and Southern Thurston Counties

Mostly clear. Patchy fog in the morning. Lows in the mid 40s to lower 50s. Northwest wind to 10 Mph with Gusts to 20 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

    64.7 °F

  • Highest 21 July, 2026

    95 °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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