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Palermo, CA Weather Forecast
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Palermo Weather Forecast
| TODAY | TONIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | MONDAY | TUESDAY |
 |  |  |  | | | | | | | |
| Mostly Sunny | Partly Cloudy | Partly Cloudy | Mostly Clear | Sunny | Clear | Sunny | Clear | Clear | Clear | Clear |
| Hi: 99°FHi: 37°C | Lo: 70°FLo: 21°C | Hi: 98°FHi: 37°C | Lo: 67°FLo: 19°C | Hi: 91°FHi: 33°C | Lo: 63°FLo: 17°C | Hi: 84°FHi: 29°C | Hi: 84°FHi: 29°C Lo: 60°FLo: 16°C | Hi: 84°FHi: 29°C Lo: 60°FLo: 16°C | Hi: 84°FHi: 29°C Lo: 60°FLo: 16°C | Hi: 84°FHi: 29°C Lo: 60°FLo: 16°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 1042 AM PDT Wed Sep 09 2026 
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Issued: 1247 PM PDT Tue Sep 8 2026
Key Messages
- Drying and warming trend through Thursday, with areas of Moderate to Major HeatRisk Wednesday and Thursday.
- Heat Advisory is in effect 10 am Wednesday - 10 pm Thursday for the Delta, Valley, and foothills.
- Cooling temperatures late week into the weekend.
- Breezy onshore winds Friday-Saturday followed by gustier north winds Sunday-Monday.
Discussion
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Today-Thursday: A fluctuating weather pattern is setting up across the region today with split flow aloft currently over interior NorCal....