Chehalis Weather Forecast

    • 55
    • 82

    Slight Chance Rain

    • 55
    • 85

    Partly Sunny

    • 56
    • 75

    Mostly Cloudy

    • 54
    • 77

    Mostly Cloudy

    • 53
    • 77

    Partly Sunny

    • 52
    • 78

    Partly Sunny

Today 23 Jul Lowlands of Lewis and Southern Thurston Counties

Mostly cloudy until late afternoon then becoming mostly sunny. A slight chance of rain in the morning. Patchy fog in the morning. Highs in the upper 70s to mid 80s. Light wind becoming west to 10 Mph in the afternoon.

Tonight 23 Jul Lowlands of Lewis and Southern Thurston Counties

Mostly clear. Patchy fog in the morning. Lows in the lower to mid 50s. West 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

    63.9 °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

    61.4 °F
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