Chehalis Weather Forecast

    • 55
    • 84

    Increasing Clouds

    • 56
    • 75

    Mostly Cloudy

    • 54
    • 75

    Slight Chance Rain

    • 54
    • 80

    Partly Sunny

    • 53
    • 76

    Slight Chance Rain

    • 51
    • 81

    Partly Sunny

Today 24 Jul Lowlands of Lewis and Southern Thurston Counties

Partly sunny in the morning then becoming sunny. Areas of fog in the Morning, then patchy fog late in the morning. Highs in the 80s. Light wind becoming west to 10 Mph in the afternoon.

Tonight 24 Jul Lowlands of Lewis and Southern Thurston Counties

Mostly clear in the evening then becoming mostly cloudy. Patchy fog in the morning. Lows in the lower to mid 50s. West wind to 10 Mph with Gusts to 20 Mph becoming southwest after midnight.

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Chehalis Temperature Statistics

July Temperature

Chehalis-Centralia Airport (1.2 miles)

  • Lowest 9 July, 2026

    46.4 °F

  • Average July

    64.4 °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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