Highlights
- An Extreme Heat Warning is in effect for the Phoenix Valley through 8 p.m. Saturday, with a High Pollution Advisory for ozone also active today.
- Afternoon highs will reach 113 degrees Tuesday, peaking near 114 Wednesday and Thursday, described as near-record temperatures for late August.
- Overnight lows will offer little relief, dropping only to the upper 80s to low 90s.
- Rain chances climb to 40 percent by Saturday night, with temperatures falling to near 106 Sunday and 103 Monday.
Phoenix is under an Extreme Heat Warning through 8 p.m. Saturday, with afternoon highs forecast to hit 113 degrees Tuesday and peak near 114 degrees Wednesday and Thursday, temperatures Arizona's Family meteorologist April Warnecke describes as near-record for late August in Phoenix.
Overnight lows will drop only to the upper 80s to low 90s, compounding heat stress for residents without adequate cooling. A High Pollution Advisory is also in effect Tuesday for ozone across the Valley; carpooling is encouraged and people with respiratory difficulties should limit time outdoors.
The heat is driven by a shift in high pressure that has pushed storm chances down and drawn drier air into the state. The National Weather Service Phoenix office confirms the Extreme Heat Warning remains in effect through Saturday for much of the area.
When does the heat break?
High pressure is expected to shift back east by the weekend, allowing moisture to return. Rain chances reach 20 percent Friday night and climb to near 40 percent Saturday night, with additional rain possible Sunday and Sunday night. Afternoon highs fall to near 106 by Sunday and 103 on Monday.
The Extreme Heat Warning expires 8 p.m. Saturday.
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 25/08/2026 13:09
- weather.gov retrieved 25/08/2026 13:09
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 25/08/2026 13:09. Every claim traces to a source.
