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Cowlitz County Weather Forecast
| TODAY | TONIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT |
 |  |  | | | |  |  |  |  | | |
| Patchy Fog | Mostly Clear | Sunny | Clear | Sunny | Mostly Clear | Chance of Rain | Chance of Rain | Chance of Rain | Partly Cloudy | Mostly Sunny | Mostly Clear |
| Hi: 71°FHi: 22°C | Lo: 49°FLo: 9°C | Hi: 79°FHi: 26°C | Lo: 51°FLo: 11°C | Hi: 80°FHi: 27°C | Lo: 51°FLo: 11°C | Hi: 69°FHi: 21°C | Lo: 45°FLo: 7°C | Hi: 59°FHi: 15°C | Lo: 41°FLo: 5°C | Hi: 61°FHi: 16°C | Lo: 41°FLo: 5°C |
| POP: 20% | POP: 20% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 501 AM PDT Tue Oct 06 2026 
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Issued: 435 AM PDT Tue Oct 6 2026
Aviation
...Through 12z Wednesday...Latest terminal observations and satellite imagery depict widespread IFR/LIFR cigs along the coast with increasing coverage of restricted vis to the south, while at inland terminals, low clouds are also increasing in coverage, especially along the Cowlitz, lower Columbia, and northern Willamette Valleys, where IFR/LIFR cigs are becoming increasingly widespread. Heading into the hours around sunrise, chances for LIFR vis/cigs will peak around 70% in areas where ...