Highlights
- An Extreme Heat Warning is in effect through 8 p.m. Thursday, with a forecast high of 109 in the Phoenix Valley.
- Temperatures drop to 106 Friday, then 104–105 over the weekend, reaching 101 by Tuesday.
- Monsoon moisture returns with a 20% storm chance Friday night and higher odds Monday and Tuesday.
- The cool-down is driven by high pressure shifting away from Arizona and a trough moving onshore to the northwest.
An Extreme Heat Warning remains in effect through 8 p.m. Thursday for the Phoenix Valley, with a forecast high of 109 degrees, AZFamily meteorologist April Warnecke reported Thursday morning. The warning is corroborated by National Weather Service alerts covering the Northwest Valley, Buckeye/Avondale, Cave Creek/New River, and surrounding zones.
Relief arrives gradually. High pressure is shifting away from Arizona, pulling in additional monsoon moisture with help from a trough of low pressure moving onshore to the northwest. Friday's high drops to 106, with a 20% chance of thunderstorms Friday night into Saturday morning. Saturday afternoon and evening are expected to be quiet before slight storm chances return Sunday night.
Storm chances increase Monday and Tuesday, when temperatures also approach seasonal norms. The forecast calls for highs of 104 Saturday, 105 Sunday and Monday, 101 Tuesday, and 101 Wednesday.
Monitor conditions through the NWS Phoenix forecast office; storm chances look highest Monday and Tuesday of next week.
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 10/09/2026 13:09
- govonestop.com retrieved 10/09/2026 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 10/09/2026 13:09. Every claim traces to a source.
