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Grayson, CA Weather Forecast
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Grayson Weather Forecast
| TODAY | TONIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SUNDAY | MONDAY |
 |  |  |  | | | | | | | |
| Mostly Sunny | Mostly Cloudy | Clearing | Mostly Clear | Mostly Sunny | Clear | Sunny | Clear | Clear | Clear | Clear |
| Hi: 93°FHi: 34°C | Lo: 71°FLo: 22°C | Hi: 97°FHi: 36°C | Lo: 73°FLo: 23°C | Hi: 99°FHi: 37°C | Lo: 69°FLo: 21°C | Hi: 93°FHi: 34°C | Hi: 90°FHi: 32°C Lo: 61°FLo: 16°C | Hi: 90°FHi: 32°C Lo: 61°FLo: 16°C | Hi: 90°FHi: 32°C Lo: 61°FLo: 16°C | Hi: 90°FHi: 32°C Lo: 61°FLo: 16°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 201 AM PDT Tue Sep 08 2026 
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Instant definitions for any meteorological term.
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Issued: 1219 PM PDT Mon Sep 7 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 and breezy onshore winds Friday into the weekend.
Discussion
...
Today-Thursday: While troughing aloft over the PacNW remains the primary driving feature of the weather pattern today, ridging aloft is beginning to build westward from the Desert Southwest. As the b...