Phoenix, Arizona – The Valley heats up again Saturday as temperatures soar to 110°F, with dangerously poor air quality expected by Monday.
According to the National Weather Service and the Arizona Department of Environmental Quality, Phoenix faces triple-digit highs all weekend, leading into an Ozone High Pollution Advisory for Maricopa County on Monday, July 7. Residents — especially those with asthma, COPD, or heart conditions — should limit outdoor activity and prepare for worsened air quality.
The advisory warns that hot, stagnant weather combined with existing ozone levels will drive 8-hour ozone concentrations to unhealthy levels by Monday. The advisory spans the entire Phoenix Metro Area, including cities along I-10 and Loop 202, with health effects likely for children, seniors, and anyone working outdoors. ADEQ urges residents to telecommute, carpool, or use mass transit and to reduce gasoline-powered equipment use until evening.
Saturday’s high of 110°F marks the beginning of a prolonged heat stretch. Sunday climbs to 111°F, and Monday matches that with little overnight cooling, creating hazardous air stagnation. While skies remain mostly clear, the dry, sunny conditions contribute to ozone buildup through early next week.
Stay weather-aware through Wednesday as extreme heat continues. More air quality alerts are possible if high temperatures persist.
🌤️ Phoenix 5-Day Weather Outlook: July 5–10
- Saturday: Sunny, high near 110°F, light west wind
- Sunday: Hot and sunny, high near 111°F, calm to west wind
- Monday: High of 111°F, Ozone Advisory active, mostly clear overnight
- Tuesday: High near 111°F, breezy afternoon with west winds 5–10 mph
- Wednesday: High of 111°F, gusts up to 20 mph, air quality may remain poor
