Phoenix sets record for its warmest low temperature ever at 97 degrees

Jul 19, 2023, 8:31 AM | Updated: 12:21 pm

A patron tries to cool off at the Justa Center as temperatures are expected to hit 116-degrees Fahr...

A patron tries to cool off at the Justa Center as temperatures are expected to hit 116-degrees Fahrenheit, Tuesday, July 18, 2023, in Phoenix, Arizona. (AP Photo/Ross D. Franklin)

(AP Photo/Ross D. Franklin)

PHOENIX – Another day, another heat record for Phoenix.

The low temperature Wednesday morning was 97 degrees, the highest low ever recorded in Phoenix, according to the National Weather Service.

The previous warm low was 96 degrees on July 15, 2003.

Meanwhile, the city’s record-setting streak of 110-degree days stretched to 20 when the mercury reached the mark before 11 a.m.

Wednesday was the third time in the last seven days with a low temperature of 95 degrees or hotter in Phoenix, according to the National Weather Service. Previously, there were only six days ever documented with lows in that range.

In addition, Phoenix’s ongoing streak of daily lows of at least 90 degrees stretched to 10 consecutive days, three days longer than the previous record.

Phoenix broke daily heat record Tuesday at 118 degrees

National Weather Service records date back to 1896. The agency uses Phoenix Sky Harbor International Airport for its official readings for the city. Other areas of the Valley saw Wednesday morning low temperatures in the low-90s.

The warm low record came the morning after Phoenix shattered its daily high mark Tuesday by hitting 118 degrees. The previous high for July 18 was 115 in 1989.

Tuesday was Phoenix’s 19th consecutive day with temperatures reaching at least 110 degrees, breaking the record streak of 18 days set in June 1974.

According to weather historian Christopher Burt of the Weather Company, no other major U.S. city has seen a longer stretch of days reaching at least 110 degrees.

Phoenix’s high and low hot streaks are expected to continue for at least another week.

Sean Benedict, a meteorologist with the National Weather Service in Phoenix, told KTAR News 92.3 FM on Wednesday the forecast calls for lows in the 90s and highs over 110 for the next seven days.

“It’s shaping up to be the hottest month ever right now with the way it’s going,” he said.

What’s causing excessive heat to linger in Phoenix?

Benedict said the city’s heat wave is caused by a combination of factors.

He said a “heat island” that traps heat overnight typically makes Sky Harbor one of the Phoenix’s warmest locations.

“We’re not able to really cool as quickly as you would out in an open desert. So that factor as well as just overall very strong high pressure lead to these very hot afternoon temperatures,” he said.

Consistently high afternoon temperatures lead to toasty mornings, Benedict said.

“It’s got a long ways to cool down,” he said.

Valley remains under excessive heat warning

The Valley has been under an excessive heat warning for the entire month of July. On Wednesday, the expiration was moved back a day to 8 p.m. Saturday, and it could be extended again if conditions don’t change.

The National Weather issues excessive heat warnings to alert communities about potentially dangerous heat. The warnings, which began in 2006, are based on several parameters, not just temperatures.

The current warning, which entered its 19th day Wednesday, is the longest ever for the Valley.

Previously, the region’s longest excessive heat warning lasted 10 days in June 2017.

KTAR News 92.3 FM’s Jim Cross contributed to this report.

We want to hear from you.

Have a story idea or tip? Pass it along to the KTAR News team here.

Arizona News

picture of end of roll of caution tape...

Tucson woman sentenced to 20 years after running woman over multiple times

Yvette Naomi Garcia was sentenced to 20 years in prison after she pleaded guilty to second-degree murder on Friday.

12 minutes ago

(Trevor's Liquor photo)...

Wills Rice

Trevor’s Liquor to open 4th location in late 2024 at Paradise Valley Mall

Trevor's Liquor announced it will be opening its fourth location in late 2024 in the Paradise Valley Mall redevelopment.

1 hour ago

Medical school students...

Brandon Gray

Gov. Katie Hobbs announces $11M investment in to state’s health care workforce

Gov. Katie Hobbs announced Friday the state will invest $11 million into the Arizona Board of Regents' AZ Healthy Tomorrow Initiative. 

3 hours ago

Iraq War veteran Sgt. Brent Bretz was selected for a new home by the by the Helping a Hero Project....

Iraq War veteran injured in explosion gifted with an adapted home in Gilbert

Iraq War veteran who lost both of his legs in an explosion was given a new home in Gilbert through the Helping a Hero program.

4 hours ago

Booking photo of Eric Donald Jones and a stock image of a house on fire. Jones, a former Chandler f...

Former Chandler firefighter sentenced to 10.5 years for setting ex-girlfriend’s house on fire

A former Chandler firefighter was sentenced to 10 1/2 years in prison for setting an ex-girlfriend's house on fire two years ago.

6 hours ago

Graphic of cyber crime yellow tape. Pinal County, Arizona, schools confirmed their data processing ...

Ford Hatchett/ABC15 Arizona

Payroll issues: Ransomware attack impacts 21 Pinal County school districts

Pinal County schools confirmed their data processing service was attacked recently, putting paychecks in jeopardy for some employees.

7 hours ago

Sponsored Articles



Importance of AC maintenance after Arizona’s excruciating heat wave

An air conditioning unit in Phoenix is vital to living a comfortable life inside, away from triple-digit heat.

Home moving relocation in Arizona 2023...

BMS Moving

Tips for making your move in Arizona easier

If you're moving to a new home in Arizona, use this to-do list to alleviate some stress and ensure a smoother transition to your new home.



Here are the biggest tips to keep your AC bill low this summer

PHOENIX — In Arizona during the summer, having a working air conditioning unit is not just a pleasure, but a necessity. No one wants to walk from their sweltering car just to continue to be hot in their home. As the triple digits hit around the Valley and are here to stay, your AC bill […]

Phoenix sets record for its warmest low temperature ever at 97 degrees