Chehalis Weather Forecast

    • 51
    • 74

    Decreasing Clouds

    • 49
    • 80

    Mostly Sunny

    • 49
    • 79

    Mostly Sunny

    • 54
    • 86

    Mostly Sunny

    • 51
    • 77

    Partly Sunny

    • 50
    • 76

    Partly Sunny

Today 28 Jul Lowlands of Lewis and Southern Thurston Counties

Mostly cloudy. Patchy fog in the morning. A slight chance of rain late in the afternoon. Highs in the lower to mid 70s. South wind to 10 Mph becoming southwest around 10 Mph in the afternoon. Gusts to 20 Mph.

Tonight 28 Jul Lowlands of Lewis and Southern Thurston Counties

Partly cloudy. Patchy fog after midnight. Areas of fog in the morning. Lows near 50. West 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

    64.6 °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

    52.1 °F

  • Average High 2021–2026

    61.4 °F
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