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Walnut School Weather Forecast
| TONIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | SATURDAY | SUNDAY | MONDAY | MONDAY NIGHT | TUESDAY |
 |  | | | | | | | | | |
| Clear | Sunny | Mostly Clear | Sunny | Mostly Clear | Mostly Clear | Mostly Clear | Mostly Clear | Sunny | Mostly Clear | Sunny |
| Lo: 59°FLo: 15°C | Hi: 91°FHi: 33°C | Lo: 60°FLo: 16°C | Hi: 99°FHi: 37°C | Lo: 61°FLo: 16°C | Hi: 89°FHi: 32°C Lo: 58°FLo: 14°C | Hi: 89°FHi: 32°C Lo: 58°FLo: 14°C | Hi: 89°FHi: 32°C Lo: 58°FLo: 14°C | Hi: 85°FHi: 29°C | Lo: 55°FLo: 13°C | Hi: 89°FHi: 32°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 310 PM PDT Tue Sep 22 2026 
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Issued: 1035 AM PDT Tue Sep 22 2026
Key Messages
1. Minor Heat Risk through Wednesday as temperatures remain around seasonal normal values.
2. Warmer temperatures dominate Thursday with a 30-50% chance of triple digits and greater than a 70% chance of a Moderate Heat Risk throughout the CWA.
Discussion
... The cut-off low pressure system that drove yesterday`s mountainous thunderstorms will be moving east through the day today, leaving our area on the leeside of its axis. This will cause thunderstorm chances to fall off a cliff as dri...