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| TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY |
 |  | |  |  | |  | | | | | |
| Patchy Fog | Partly Cloudy | Patchy Fog | Mostly Sunny | Mostly Clear | Partly Cloudy | Partly Cloudy | Partly Cloudy | Mostly Clear | Partly Cloudy | Mostly Clear | Mostly Sunny |
| Lo: 57°FLo: 14°C | Hi: 84°FHi: 29°C | Lo: 57°FLo: 14°C | Hi: 89°FHi: 32°C | Lo: 61°FLo: 16°C | Hi: 87°FHi: 31°C | Lo: 59°FLo: 15°C | Hi: 83°FHi: 28°C | Lo: 57°FLo: 14°C | Hi: 87°FHi: 31°C | Lo: 61°FLo: 16°C | Hi: 91°FHi: 33°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 1152 AM PDT Thu Sep 17 2026 
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Issued: 917 PM PDT Thu Sep 17 2026
Discussion
...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE... SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO COUNTIES...
...UPDATED AVIATION DISCUSSION...
Today through this weekend...
Current satellite and 500mb RAP analysis this afternoon reveals a potent upper low centered across northern California this afternoon. This feature is inducing low thickness and southwesterly flow aloft, which is fueling the below average temperatures seen the last few days. Highs this afternoon...