Weather World
City of Chehalis, WAChehalis, WA Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Chehalis Weather Forecast
| TODAY | TONIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT |
 |  |  | |  |  | | | | | | |
| Patchy Fog | Mostly Clear | Mostly Sunny | Mostly Clear | Partly Sunny | Partly Cloudy | Mostly Cloudy | Mostly Clear | Mostly Sunny | Mostly Clear | Sunny | Mostly Clear |
| Hi: 73°FHi: 23°C | Lo: 50°FLo: 10°C | Hi: 75°FHi: 24°C | Lo: 50°FLo: 10°C | Hi: 71°FHi: 22°C | Lo: 50°FLo: 10°C | Hi: 70°FHi: 21°C | Lo: 49°FLo: 9°C | Hi: 71°FHi: 22°C | Lo: 49°FLo: 9°C | Hi: 71°FHi: 22°C | Lo: 50°FLo: 10°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 236 AM PDT Sat Oct 03 2026 
Chehalis Radar Loop
Use the map search tool if you want to place a location marker on the radar map...
Chehalis Weather Map
Chehalis Quick Facts
Chehalis Forecast Discussion
Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 835 AM PDT Sat Oct 3 2026
Aviation
... An upper-ridge is building across the region bringing west- southwesterly flow aloft. High cloud coverage is streaming overhead but not thick enough to discourage low clouds/fog development. As a result, LIFR/IFR fog/low stratus will continue this morning before conditions improve toward 19-20z to VFR as offshore flow increases. An additional round of low clouds/fog is in store overnight Saturday into Sunday morning.
KSEA...Surface wind will remain northerly through the period between...