Chehalis Weather Forecast

    • 53
    • 72

    Increasing Clouds

    • 51
    • 72

    Mostly Cloudy

    • 49
    • 69

    Chance Rain

    • 49
    • 72

    Mostly Cloudy

    • 52
    • 73

    Chance Rain

    • 51
    • 69

    Rain Likely

Today 27 Aug Lowlands of Lewis and Southern Thurston Counties

Cloudy in the morning then becoming partly sunny. Patchy fog in the morning. A slight chance of Showers early in the afternoon. Highs near 70. South wind to 10 Mph becoming southwest around 10 Mph with Gusts to 20 Mph in the afternoon.

Tonight 27 Aug Lowlands of Lewis and Southern Thurston Counties

Partly cloudy in the evening then becoming mostly cloudy. Patchy fog after midnight. Lows in the lower to mid 50s. West wind to 10 Mph in the evening becoming light.

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Chehalis Temperature Statistics

August Temperature

Chehalis-Centralia Airport (1.2 miles)

  • Lowest 3 August, 2026

    48.2 °F

  • Average August

    65.9 °F

  • Highest 5 August, 2026

    89.6 °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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