Phoenix forecast calls for continued high temperatures without additional monsoon activity

Sunday night’s monsoon storm activity in metro Phoenix produced plenty of blowing dust but not much rain as the threat of extreme heat continues.

In fact, the ongoing extreme heat warning that was set to expire Friday has been extended by a day.

A haboob blew through the Valley around 9 p.m. Sunday, triggering a dust storm warning across the region. Isolated showers developed in a few areas later in the night and early Monday, but there was no widespread rainfall.

“Much of the Valley received decent dust. And then some rain moved through, but a lot of it kind of skirted around Phoenix,” Chris Kuhlman, a meteorologist with the National Weather Service in Phoenix, told KTAR News 92.3 FM on Monday morning. “So, parts … just south of Phoenix and west of Phoenix did see some rainfall. The rest of Phoenix pretty much was very light.”

Phoenix adds 0.04 inches to its monsoon season rainfall total

Phoenix Sky Harbor International Airport, which the weather service uses for the city’s official readings, was one of the spots that got wet. The airport’s rain gauge registered 0.04 inches shortly after midnight, increasing Phoenix’s 2026 monsoon total to 1.25 inches, about 0.4 inches below normal for this point in the season.

Kuhlman said the total is unlikely to increase in the near future. The Arizona monsoon season runs annually from June 15 to Sept. 30.

“We have a few maybe lingering showers in the East Valley this morning. Aside from that, we’re really not expecting any additional rainfall through the entire workweek,” he said. “It’s just going to be hot and fairly dry conditions.”

The Phoenix area has been under an extreme heat warning since Aug. 17. The expiration date has been pushed back several times, most recently to Saturday night.

Will Phoenix break more heat records this week?

More records could fall this week after Phoenix set a daily record high of 115 degrees on Saturday. The forecast calls for highs near record levels Tuesday, Wednesday and Thursday.

This week will be hot and dry into the weekend. The Extreme Heat Warning will remain in effect throughout the week with widespread Major to Extreme HeatRisk across the region with temperatures well above 110 degrees most days and very little in terms of overnight relief. #azwx pic.twitter.com/88179qR3a4

— NWS Phoenix (@NWSPhoenix) August 24, 2026

“Today, highs will be lower than what they were the last few days, but we’re still above normal. And then we’ll warm back up to above 110 starting Tuesday with … a decent shot at hitting 115 degrees Wednesday and Thursday,” Kuhlman said.

The Valley is on track to be under an extreme heat warning for 22 days in August after an earlier warning ran from July 23 to Aug. 9.

If it is not extended again, the current metro Phoenix warning will run 13 days and put the 2026 total at 44 days. That’s the third most on record behind 2020 (48 days) and 2024 (45 days).

How to stay safe during extreme heat warnings

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

The danger is real. The Maricopa County Public Health Department has confirmed 81 heat-related deaths so far this year, more than double the number at this time in 2025.

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 Maricopa County Heat Relief Network offers free, cool spaces and other resources to people who need relief from the heat from May to September.

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

KTAR News 92.3 FM’s Shira Tanzer contributed to this report.

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