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Mount Signal School, CA Weather Forecast
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Mount Signal School Weather Forecast
| TODAY | TONIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT |
 |  |  |  | | | |  |  |  | | |
| Sunny | Mostly Clear | Partly Sunny | Partly Cloudy | Mostly Sunny | Partly Cloudy | Mostly Sunny | Chance of T-Storm | Chance of T-Storm | Chance of Showers | Mostly Sunny | Mostly Clear |
| Hi: 113°FHi: 45°C | Lo: 83°FLo: 28°C | Hi: 116°FHi: 47°C | Lo: 84°FLo: 29°C | Hi: 115°FHi: 46°C | Lo: 87°FLo: 31°C | Hi: 113°FHi: 45°C | Lo: 87°FLo: 31°C | Hi: 113°FHi: 45°C | Lo: 87°FLo: 31°C | Hi: 111°FHi: 44°C | Lo: 83°FLo: 28°C |
| POP: 10% | POP: 10% | POP: 10% |
POP = Probability of Precipitation.
Weather Outlook Updated: 400 AM PDT Tue Aug 25 2026 
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Issued: 155 AM MST Tue Aug 25 2026
Key Messages
- Extreme Heat Warnings remain in effect through Saturday with daily Major to Extreme Heat Risk.
- Lower desert highs are likely to reach or exceed 110 degrees through the rest of the work week and even into the weekend, peaking around daily records during the middle of the week.
- Monsoon storm chances will essentially come to an end starting today before slowly returning this coming weekend.
Aviation
...Updated at 0505Z.
South Central Arizona including KPHX, KIWA, KSDL, and KDVT:
No aviation...