Weather World
Poston School, AZ Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Poston School Weather Forecast
| TONIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY |
 |  | | | |  |  | | |  | | |
| Partly Cloudy | Mostly Sunny | Partly Cloudy | Mostly Sunny | Partly Cloudy | Partly Sunny | Chance of T-Storm | Partly Sunny | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm |
| Lo: 83°FLo: 28°C | Hi: 110°FHi: 43°C | Lo: 83°FLo: 28°C | Hi: 110°FHi: 43°C | Lo: 84°FLo: 29°C | Hi: 111°FHi: 44°C | Lo: 86°FLo: 30°C | Hi: 112°FHi: 44°C | Lo: 85°FLo: 29°C | Hi: 110°FHi: 43°C | Lo: 85°FLo: 29°C | Hi: 108°FHi: 42°C |
| POP: 10% | POP: 20% | POP: 10% | POP: 20% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 400 PM MST Tue Aug 18 2026 
Poston School Radar Loop
Use the map search tool if you want to place a location marker on the radar map...
Poston School Weather Map
Poston School Quick Facts
Poston School Forecast Discussion
Issued: 447 PM MST Tue Aug 18 2026
Key Messages
.- Temperatures will remain several degrees above daily normals through this weekend with lower desert highs ranging between 107-113 degrees and overnight lows in the mid 80s to low 90s.
- Extreme Heat Warnings are in effect through Friday evening due to widespread major HeatRisk.
- Thunderstorm activity is expected to increase in coverage through mid-week with chances returning to the south-central Arizona lower deserts as early as Wednesday.
Aviation
...Updat...