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Katella High School Weather Forecast
| TONIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY |
 |  |  | | | | | | | |  |  |
| Mostly Clear | Partly Cloudy | Partly Cloudy | Partly Cloudy | Mostly Clear | Partly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy | Chance of Showers | Chance of Showers |
| Lo: 64°FLo: 18°C | Hi: 89°FHi: 32°C | Lo: 67°FLo: 19°C | Hi: 90°FHi: 32°C | Lo: 67°FLo: 19°C | Hi: 90°FHi: 32°C | Lo: 68°FLo: 20°C | Hi: 90°FHi: 32°C | Lo: 67°FLo: 19°C | Hi: 84°FHi: 29°C | Lo: 64°FLo: 18°C | Hi: 82°FHi: 28°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 137 PM PDT Tue Sep 22 2026 
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Issued: 521 PM PDT Tue Sep 22 2026
Discussion
...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE... SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO COUNTIES...
...UPDATED AVIATION DISCUSSION for 00Z TAF ISSUANCE...
Sunnier skies are expected this afternoon with high temperatures running near to up to 7 degrees warmer than yesterday. The marine layer is expected to get shallower over the next few nights, staying mostly confined the the coast. Conditions will warm through the middle of the week.
Wednesday, high tempe...