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| Mostly Cloudy | Patchy Fog | Mostly Cloudy | Partly Cloudy | Partly Sunny | Partly Cloudy | Partly Sunny | Partly Cloudy | Partly Sunny | Partly Cloudy | Partly Sunny | Mostly Cloudy |
| Hi: 65°FHi: 18°C | Lo: 51°FLo: 11°C | Hi: 69°FHi: 21°C | Lo: 51°FLo: 11°C | Hi: 69°FHi: 21°C | Lo: 51°FLo: 11°C | Hi: 69°FHi: 21°C | Lo: 51°FLo: 11°C | Hi: 65°FHi: 18°C | Lo: 51°FLo: 11°C | Hi: 65°FHi: 18°C | Lo: 51°FLo: 11°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 1127 AM PDT Fri Sep 18 2026 
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Issued: 1051 AM PDT Fri Sep 18 2026
Discussion
..Now through next Friday...Satellite observations from early Friday morning showed a low marine stratus deck along the coast and Coast Range expanding into the lower Columbia and southern Willamette Valley. This cloud deck will most likely (60-80% chance) continue to expand towards sunrise, eventually filling in across the central and northern Willamette Valley, Cowlitz Valley, and greater Portland/Vancouver metro area. Morning clouds will eventually give way to afternoon sun as dayti...