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Arrowhead Tank Weather Forecast
| TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY |
 |  | | | |  | | | |  |  | |
| Partly Cloudy | Chance of T-Storm | Partly Cloudy | Chance of T-Storm | Partly Cloudy | Partly Sunny | Partly Cloudy | Partly Sunny | Partly Cloudy | Mostly Sunny | Chance of T-Storm | Partly Sunny |
| Lo: 74°FLo: 23°C | Hi: 99°FHi: 37°C | Lo: 74°FLo: 23°C | Hi: 98°FHi: 37°C | Lo: 74°FLo: 23°C | Hi: 97°FHi: 36°C | Lo: 70°FLo: 21°C | Hi: 99°FHi: 37°C | Lo: 71°FLo: 22°C | Hi: 99°FHi: 37°C | Lo: 71°FLo: 22°C | Hi: 99°FHi: 37°C |
| POP: 10% | POP: 10% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 400 PM MST Fri Aug 21 2026 
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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...