Highlights
- An Extreme Heat Warning remains in effect Friday and Saturday, with a high of 112 degrees expected Friday in Phoenix.
- The warning expires at 8 p.m. Saturday as a shifting pressure ridge draws monsoon moisture into Arizona.
- Storm chances climb to 50 percent Saturday evening and hold at 40 to 50 percent through Monday, with damaging winds and heavy rain possible.
- Temperatures drop to around 105 degrees Sunday before drier air returns and cuts storm chances from Tuesday onward.
Phoenix is forecast to hit 112 degrees Friday under an Extreme Heat Warning that remains in effect through 8 p.m. Saturday, according to Arizona's Family meteorologist April Warnecke. Friday and Saturday are both designated First Alert Weather Days for heat; Sunday and Monday carry First Alert designations for monsoon storm risk.
The heat is tied to a strong ridge of high pressure that has dominated the region for the past week. That ridge is shifting east, and a trough of low pressure moving onshore in the Northwest will draw additional moisture into Arizona, raising humidity and storm chances through the holiday weekend. Saturday is expected to reach about 109 degrees before conditions begin to change.
Storm chances reach 50 percent by Saturday evening, then hold at 40 to 50 percent through Sunday, Sunday night, and into Monday. Strong storms are possible, with damaging winds and heavy rain. The National Weather Service Phoenix office separately noted that high pressure has kept temperatures 5 to 9 degrees above normal and near record territory.
Temperatures fall with the cloud cover and rain chances, with a high near 105 degrees expected Sunday and readings near the triple-digit mark Monday. Drier air moves in and cuts storm chances from Tuesday onward.
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 28/08/2026 13:22
- weather.gov retrieved 28/08/2026 13:22
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 28/08/2026 13:22. Every claim traces to a source.
