Chehalis Weather Forecast

    • 62
    • 100

    Chance Rain

    • 55
    • 81

    Slight Chance Rain

    • 55
    • 84

    Partly Sunny

    • 55
    • 73

    Mostly Cloudy

    • 53
    • 75

    Mostly Cloudy

    • 54
    • 75

    Mostly Cloudy

Today 22 Jul Lowlands of Lewis and Southern Thurston Counties

Sunny. Patchy fog in the morning. Patchy smoke late in the afternoon. Highs 96 to 101. Light wind.

Tonight 22 Jul Lowlands of Lewis and Southern Thurston Counties

Mostly cloudy. A slight chance of Thunderstorms until early morning. A chance of Showers late in the Evening, then a chance of Showers in the morning. Lows near 60. Northwest wind to 10 Mph becoming southwest after midnight. Gusts to 20 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Chehalis Temperature Statistics

July Temperature

Chehalis-Centralia Airport (1.2 miles)

  • Lowest 9 July, 2026

    46.4 °F

  • Average July

    62.9 °F

  • Highest 6 July, 2026

    86 °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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