Phoenix's average temperature in July-August was 99, breaking 2023 record

Phoenix has broken the record for its hottest meteorological summer ever, a record it set only last year.

The “meteorological summer” refers to the months of June, July and August. Meteorological seasons follow the annual temperature cycle rather than the Earth’s position around the sun.

According to Phoenix National Weather Service meteorologist Mark O’Malley, the average high temperature last year was a record 97 degrees. This year, it was 99.

“If you look at all the stations across the state, most of the record warmest temperatures have occurred in the past ten years, and that trend will likely continue for the next ten to twenty years,” O’Malley said.

O’Malley also said that Phoenix is likely to break another record in the coming week: its record of days above 110.

“We’re currently sitting at 54 days, the record was 55 days set last year, so with several days on the docket above 110, we will break that record later this week,” he said.

Most Arizonans are no strangers to heat, or days above 110 degrees. But record-breaking high temperatures year after year are making central and southern Arizona more dangerous during the summer.

And Arizona's first responders are feeling that heat.

Phoenix Fire Captain Rob McDade said that emergency services have already responded to several calls over Labor Day weekend for hikers who were underprepared and overwhelmed.

McDade said people need to ensure they're in peak condition before setting out on a hike in the heat.

"Do not push yourself to make it to the top because when you're running out of water, it's time to turn around. When you have half of your water, turn around and head back down," McDade said.

Aside from staying hydrated, McDade also said people should know their physical limits before going out to avoid becoming the next rescue call.

NOAA

In 2023, more than 600 heat deaths were reported in Maricopa County alone, with nearly 400 being directly caused by heat.

Phoenix’s Office of Heat Response says on its website that heat-related illnesses disproportionately affect those sensitive to heat, like the elderly and the homeless.

Phoenix does set up a “Heat Relief Network” throughout the city during the summer to ensure that people have access to cool air and cold water.