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Chatham School Weather Forecast
| TODAY | TONIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | MONDAY | TUESDAY |
 |  | | | | |  |  | | | |
| Sunny | Clear | Sunny | Mostly Clear | Sunny | Mostly Clear | Partly Cloudy | Partly Cloudy | Mostly Clear | Mostly Clear | Sunny |
| Hi: 91°FHi: 33°C | Lo: 61°FLo: 16°C | Hi: 99°FHi: 37°C | Lo: 61°FLo: 16°C | Hi: 91°FHi: 33°C | Lo: 61°FLo: 16°C | Hi: 91°FHi: 33°C Lo: 60°FLo: 16°C | Hi: 91°FHi: 33°C Lo: 60°FLo: 16°C | Hi: 85°FHi: 29°C Lo: 55°FLo: 13°C | Hi: 85°FHi: 29°C Lo: 55°FLo: 13°C | Hi: 89°FHi: 32°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 1141 AM PDT Wed Sep 23 2026 
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Issued: 1138 AM PDT Wed Sep 23 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 a greater than 70% chance of Moderate Heat Risk throughout the Valley.
Discussion
... Weak Ridging moving through the West Coast ahead of a trough expected later this week. In the meanwhile, the interaction of the two features will allow for a good surge of southerly air into California. This surge will result in th...