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St. Joseph Cathedral Weather Forecast
| TODAY | TONIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT |
 |  |  | | | |  |  |  | | | |
| Partly Cloudy | Partly Cloudy | Mostly Sunny | Partly Cloudy | Partly Cloudy | Partly Cloudy | Patchy Fog | Chance of Showers | Chance of Showers | Chance of Showers | Chance of Showers | Chance of Showers |
| Hi: 82°FHi: 28°C | Lo: 64°FLo: 18°C | Hi: 82°FHi: 28°C | Lo: 64°FLo: 18°C | Hi: 80°FHi: 27°C | Lo: 64°FLo: 18°C | Hi: 81°FHi: 27°C | Lo: 65°FLo: 18°C | Hi: 84°FHi: 29°C | Lo: 70°FLo: 21°C | Hi: 87°FHi: 31°C | Lo: 70°FLo: 21°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 1242 AM PDT Tue Sep 01 2026 
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Issued: 437 AM PDT Tue Sep 1 2026
Discussion
...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE... SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO COUNTIES...
...UPDATED AVIATION DISCUSSION...
.SHORT TERM (Today through Thursday)... Cooler and drier weather will continue for inland areas through Thursday with high temperatures as much as 4 to 8 degrees below average. High temperatures will range from the mid to upper 70s near the coast to the mid 80s to lower 90s for the Inland Empire with the lower deserts aroun...