National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Extreme Heat and Excessive Rainfall Today

Dangerous and extreme heat will remain across portions of the southern U.S. this week. A heat wave over the Southwest U.S. will intensify this week, peaking and expanding into the Intermountain West and northern High Plains this weekend. Multiple rounds of thunderstorms will produce heavy to excessive rainfall with significant flash flooding across portions of southern New England today. Read More >

Current conditions at

Chehalis-Centralia Airport (KCLS)

Lat: 46.677°NLon: 122.9827°WElev: 177.0ft.

Clear

59°F

15°C

Humidity 100%
Wind Speed N 0 MPH
Barometer 30.06 in (1017.95 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 29 Jul 09:15 AM PDT
Extended Forecast for

Chehalis WA

  • Today

    Today: Sunny, with a high near 78. Calm wind becoming north northwest around 6 mph in the afternoon.

    High: 78 °F

    Sunny

  • Tonight

    Tonight: Areas of fog after 2am. Otherwise, mostly clear, with a low around 50. West northwest wind 5 to 8 mph becoming calm in the evening.

    Low: 50 °F

    Mostly Clear
    then Areas
    Fog

  • Thursday

    Thursday: Areas of fog before 9am. Otherwise, mostly sunny, with a high near 78. Calm wind becoming west northwest around 5 mph in the afternoon.

    High: 78 °F

    Areas Fog
    then Sunny

  • Thursday Night

    Thursday Night: Patchy fog after 2am. Otherwise, mostly clear, with a low around 52. West northwest wind around 6 mph becoming calm in the evening.

    Low: 52 °F

    Clear then
    Patchy Fog

  • Friday

    Friday: Sunny, with a high near 84. Light north wind.

    High: 84 °F

    Sunny

  • Friday Night

    Friday Night: A 20 percent chance of rain after 11pm. Partly cloudy, with a low around 57.

    Low: 57 °F

    Slight Chance
    Rain

  • Saturday

    Saturday: A 40 percent chance of rain, mainly before 11am. Partly sunny, with a high near 71.

    High: 71 °F

    Chance Rain

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 52.

    Low: 52 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 74.

    High: 74 °F

    Partly Sunny

Detailed Forecast

Today
Sunny, with a high near 78. Calm wind becoming north northwest around 6 mph in the afternoon.
Tonight
Areas of fog after 2am. Otherwise, mostly clear, with a low around 50. West northwest wind 5 to 8 mph becoming calm in the evening.
Thursday
Areas of fog before 9am. Otherwise, mostly sunny, with a high near 78. Calm wind becoming west northwest around 5 mph in the afternoon.
Thursday Night
Patchy fog after 2am. Otherwise, mostly clear, with a low around 52. West northwest wind around 6 mph becoming calm in the evening.
Friday
Sunny, with a high near 84. Light north wind.
Friday Night
A 20 percent chance of rain after 11pm. Partly cloudy, with a low around 57.
Saturday
A 40 percent chance of rain, mainly before 11am. Partly sunny, with a high near 71.
Saturday Night
Partly cloudy, with a low around 52.
Sunday
Partly sunny, with a high near 74.
Sunday Night
Mostly clear, with a low around 52.
Monday
Sunny, with a high near 82.
Monday Night
Mostly clear, with a low around 55.
Tuesday
Sunny, with a high near 87.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Chehalis WA
 46.68°N 122.98°W (Elev. 180 ft)
Last Update:
1:18 am PDT Jul 29, 2026
Forecast Valid:
9am PDT Jul 29, 2026-6pm PDT Aug 4, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation