Extreme heat warning for metro Phoenix extended as high temperatures persist

The extreme heat warning for the Phoenix area has been extended by a day, as potentially dangerous high temperatures persist.

The warning, which covers most of central and southern Arizona, will now run until 8 p.m. Friday. It began Tuesday and was originally scheduled to expire Thursday evening.

Extreme Heat Warnings for the Phoenix metro and El Centro have been extended through Friday evening. Expect highs 111-116°F today and 110-115°F Friday with very warm overnight temperatures. The weekend will still be hot, but more like 106-110°F. #azwx #cawx pic.twitter.com/jSlg4rGgAr

— NWS Phoenix (@NWSPhoenix) July 9, 2026

The Phoenix forecast calls for highs of 114 degrees Thursday and 112 on Friday. And with an expected overnight low of a still-toasty 90 degrees, there won’t be much relief in between.

“It was just enough to extend the warning another day,” meteorologist Chris Kuhlman of the National Weather Service in Phoenix told KTAR News 92.3 FM on Thursday morning.

When will Phoenix see monsoon rainstorms?

After the extreme heat warning expires, Phoenix highs are expected to fluctuate between 107 and 110 degrees at least into the middle of next week. The normal high for this time of year is 107.

The weekend forecast includes the possibility of the Valley’s first monsoon storms of the season.

“Rain chances really won’t appear until probably Sunday,” Kuhlman said. “I mean, there could be a few showers or storms Saturday night, but chances are about 10%. Sunday it looks to be a pretty good bet, 30 to 40% during the late afternoon and evening.”

Kuhlman added that the next week could be a “semi-active monsoon period.”

“Hopefully we’ll get some rain and maybe even cool things down a little bit more,” he said.

March 29 was the last time measurable rain fell at Phoenix Sky Harbor International Airport, which the National Weather Service uses for the city’s official readings.

Arizona’s monsoon season runs from June 15 to Sept. 30, but it’s not uncommon for the early weeks to pass without storms in the Valley.

What to know about extreme heat warnings

Extreme heat warnings trigger the daytime closures of hiking trails at Camelback Mountain, Piestewa Peak and South Mountain in Phoenix.

Health experts urge precautions during times of extreme heat such as keeping hydrated, wearing light clothing and remaining indoors with air conditioning during the hottest times of the day.

The Salvation Army opens 10 heat relief stations across the Valley during extreme heat warnings.

In addition, the Maricopa County Heat Relief Network provides free, cool spaces and other resources to people in need from May through September.

KTAR News 92.3 FM’s Colton Krolak contributed to this report.

Related

Maricopa County heat deaths surge past 2025's pace as officials expand cooling resourcesASU launches first-of-its-kind study of Phoenix-area monsoonKTAR Weather Center: Forecast, radar maps, latest newsPhoenix-area extreme heat warning probably will be extended again, NWS meteorologist saysPhoenix heat reaches record high Sunday with extreme heat expected through TuesdayHeat wave expected to bring record-breaking temps, heighten wildfire risk to parts of US