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St. Marks School Weather Forecast
| TODAY | TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT |
 |  |  | | | | | | | | |  |
| Chance of T-Storm | Mostly Clear | Sunny | Clear | Sunny | Clear | Sunny | Mostly Clear | Mostly Sunny | Clear | Sunny | Partly Cloudy |
| Hi: 83°FHi: 28°C | Lo: 60°FLo: 16°C | Hi: 76°FHi: 24°C | Lo: 59°FLo: 15°C | Hi: 76°FHi: 24°C | Lo: 58°FLo: 14°C | Hi: 78°FHi: 26°C | Lo: 59°FLo: 15°C | Hi: 80°FHi: 27°C | Lo: 60°FLo: 16°C | Hi: 82°FHi: 28°C | Lo: 62°FLo: 17°C |
| POP: 10% |
POP = Probability of Precipitation.
Weather Outlook Updated: 211 PM MST Thu Oct 22 2026 
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Issued: 155 PM MST Thu Oct 22 2026
Key Messages
- Thunderstorms capable of severe weather and flooding will exit through eastern Arizona this evening with drier air surging into the region.
- More benign weather conditions will filter into the area Friday and through the weekend with only a few lingering showers over mountain locations in Arizona.
- Below normal temperatures through early next week will warm closer to the seasonal average by the middle of next week.
Aviation
...Updated at 1803Z.
South Central Arizona including KPHX, KIWA, ...