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Willow Brook School, CA Weather Forecast
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Willow Brook School Weather Forecast
| TONIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY |
 |  | | | | | | | | | | |
| Mostly Clear | Mostly Sunny | Mostly Clear | Mostly Sunny | Mostly Clear | Mostly Sunny | Clear | Sunny | Mostly Clear | Mostly Sunny | Clear | Sunny |
| Lo: 63°FLo: 17°C | Hi: 97°FHi: 36°C | Lo: 67°FLo: 19°C | Hi: 102°FHi: 39°C | Lo: 71°FLo: 22°C | Hi: 101°FHi: 38°C | Lo: 72°FLo: 22°C | Hi: 99°FHi: 37°C | Lo: 71°FLo: 22°C | Hi: 98°FHi: 37°C | Lo: 71°FLo: 22°C | Hi: 99°FHi: 37°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 1230 PM PDT Wed Sep 30 2026 
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Issued: 418 PM PDT Wed Sep 30 2026
Discussion
...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE... SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO COUNTIES...
...UPDATED AVIATION DISCUSSION...
Tonight through Thursday...
A ridge is building back in over the region as the upper level low that was positioned over Arizona continues to propagate eastward. This is going to allow for the positively-tilted ridge to continue to expand back towards the northeast. This will result in temperatures gradually increasing throug...