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| TONIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY |
 |  |  |  | |  | |  |  | | | |
| Partly Cloudy | Partly Sunny | Mostly Cloudy | Chance of Rain | Mostly Cloudy | Chance of Rain | Rain | Chance of T-Storm | Chance of Rain | Partly Sunny | Mostly Cloudy | Partly Sunny |
| Lo: 50°FLo: 10°C | Hi: 65°FHi: 18°C | Lo: 50°FLo: 10°C | Hi: 65°FHi: 18°C | Lo: 46°FLo: 8°C | Hi: 61°FHi: 16°C | Lo: 49°FLo: 9°C | Hi: 60°FHi: 16°C | Lo: 43°FLo: 6°C | Hi: 63°FHi: 17°C | Lo: 45°FLo: 7°C | Hi: 63°FHi: 17°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 236 PM PDT Mon Sep 21 2026 
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Issued: 237 PM PDT Mon Sep 21 2026
Aviation
... Southwest flow aloft is expected across Western Washington into Tuesday. Low level onshore flow will increase behind a front tonight for increasing low level moisture across the lowlands overnight through most of Tuesday morning. Widespread MVFR ceilings will develop tonight and persist across the lowlands into early afternoon on Tuesday. Low level convergence will lead to some spotty light rain or drizzle in central Puget Sound Tuesday morning.
KSEA...VFR will continue into this even...