Weather WorldGrapevine, AZ Weather Forecast
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Grapevine Weather Forecast
| TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY |
 |  |  |  | | |  | | | | | |
| Mostly Clear | Partly Sunny | Chance of T-Storm | Mostly Sunny | Chance of T-Storm | Partly Sunny | Partly Cloudy | Partly Sunny | Mostly Clear | Mostly Sunny | Mostly Clear | Mostly Sunny |
| Lo: 78°FLo: 26°C | Hi: 106°FHi: 41°C | Lo: 78°FLo: 26°C | Hi: 104°FHi: 40°C | Lo: 78°FLo: 26°C | Hi: 100°FHi: 38°C | Lo: 76°FLo: 24°C | Hi: 102°FHi: 39°C | Lo: 78°FLo: 26°C | Hi: 103°FHi: 39°C | Lo: 77°FLo: 25°C | Hi: 102°FHi: 39°C |
| POP: 10% | POP: 10% |
POP = Probability of Precipitation.
Weather Outlook Updated: 400 PM MST Fri Aug 21 2026 
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Grapevine Forecast Discussion
Issued: 430 PM MST Fri Aug 21 2026
Key Messages
- High temperatures reach or exceed 110 degrees nearly every day through the next week and will be within a few degrees of daily records, while morning lows remain unusually warm.
- Extreme Heat Warning in effect through next Friday evening with daily Major to Extreme HeatRisk.
- Isolated thunderstorms will primarily favor higher terrain areas through this weekend, with drier and less favorable conditions next week.
Aviation
...Updated at 2330Z.
South Central Arizona including KPHX, KIWA, KSD...