Highlights
- An Extreme Heat Watch and First Alert Days are in effect for the Phoenix metro Monday through Friday.
- Highs are forecast to reach approximately 111 degrees, up from a below-average 101 on Friday.
- Monsoon moisture has exited the Valley, dropping storm chances significantly through the week.
- Some relief is possible the following weekend as monsoon moisture is expected to return by late next week.
An Extreme Heat Watch and First Alert Days cover the Phoenix metro from Monday through Friday, with high temperatures forecast to climb to approximately 111 degrees, Arizona's Family meteorologist Paul Horton reported Saturday morning. FOX 10 Phoenix is also tracking the heat event.
Friday's high of 101 degrees ran 4 degrees below average, but the cool stretch is ending fast. Temperatures will climb to 105 on Saturday as drier air replaces the monsoon moisture that drove recent thunderstorm activity, then reach 108 on Sunday before crossing into watch territory Monday.
The departure of monsoon moisture means storm chances drop sharply across the Valley through the week, though a slight chance of storms remains along the rim.
Scottsdale officials have separately urged residents to make heat-smart decisions as the Extreme Heat Watch takes hold across the metro, according to Patch.
Health guidance for the week: stay hydrated throughout the day even without thirst, limit outdoor activity between 3 p.m. and 7 p.m., never leave children or pets in vehicles, check on elderly neighbors, and keep air conditioning maintained with a backup cooling plan ready.
Monsoon moisture is expected to increase again by the end of next week, with storms possible the following weekend, though Horton cautioned that timeline could shift.
Sources
Every factual claim in this article traces to one of the sources below. See how we work for the editorial process.
- AZ Family (3TV/CBS5) retrieved 15/08/2026 15:25
- Fox 10 Phoenix retrieved 15/08/2026 15:25
- patch.com retrieved 15/08/2026 15:25
Authored by The Scottsdale Signal. Drafted by AI from primary-source material under our beat-specific editorial guides; reviewed by humans before publish under our five-gate process. Sources retrieved at 15/08/2026 15:25. Every claim traces to a source.
