Phoenix Braces for an Early Heat Wave

Scenic view of Phoenix during a heat wave

News Summary

Phoenix residents are preparing for an unseasonably early heat wave as temperatures are set to soar into the triple digits next week. With highs expected to reach 100 degrees, this could mark one of the earliest occurrences of such heat in the city’s history. Meteorologists predict a 20% chance of triple-digit temperatures emerging soon, prompting warnings for residents to stay hydrated and cool. The rise in temperatures continues a worrying trend in Phoenix weather patterns, which have seen significant increases in average temperatures over the past decades.

Phoenix Braces for an Early Heat Wave: Triple-Digit Temperatures on the Horizon

Hey there, Phoenix! If you thought this spring would be all about blooming flowers and gentle breezes, think again. The weather folks are gearing up for some serious heat as our city is preparing for early triple-digit temperatures next week. That’s right, you heard it! High pressure is moving in, and it looks like we’re in for a bit of a sizzle.

Get Ready for the 90s!

Starting Tuesday, temperatures are expected to shoot up into the 90s, making it feel more like summer than spring. But hold onto your hats, because by the end of the week, we could be flirting with the 100-degree mark! If we do hit that milestone on Thursday or Friday, it won’t just be another hot day. It will mark the first time in 2025 that Phoenix sees temperatures break into the 100s and will rank among the top five earliest triple-digit days in our city’s history.

Setting Records and Breaking Barriers

Getting a high of 100 degrees on Friday? That would be enough to set a record for that specific day. Typically, we expect our first 100-degree day around May 2. But last year, we jumped the gun, experiencing our first 100-degree day on April 21—a full two weeks earlier. Now, wouldn’t it be something if we hit that mark even sooner?

A Historical Perspective

For those curious about how crazy this weather can get, it’s worth noting that the Phoenix weather station has only recorded a 100-degree day in March once—back in 1988. Speaking of records, last year was a doozy with Phoenix reaching its hottest temperatures in history. The Valley saw a whopping 70 days at or above 110 degrees—that’s about 20% of the entire year.

The Warming Trend

Over the past 50 years, it seems Phoenix has shown a consistent warming trend, with our average temperatures on the rise. And it’s not just daytime temperatures that need our attention. Nighttime temps have been particularly impactful, raising concerns across Arizona. It’s getting warmer at night, too!

Less Rainfall Adding to the Trouble

Speaking of weather, let’s talk about rainfall. So far in 2024, Sky Harbor has recorded just 4.54 inches of rain—2.68 inches below average. And it seems like the Monsoon season is also throwing us some shades of disappointment, with average rainfall dropping from 2.71 inches to 2.43 inches over the decades. It’s the same story with our yearly rainfall falling from an average of 8.03 inches down to 7.22 inches.

A Temporary Cool Down Before the Heat

Right now, we are experiencing a brief respite with some pleasant lows in the low 70s in the forecast before the heat kicks back in. The hottest day we’ve seen so far in 2025 was on March 25, when we reached a steamy 99 degrees—just a hair below the record for the earliest 100-degree day which sits at March 26, 1988.

What’s Next?

Meteorologists are estimating about a 20% chance of Phoenix reaching triple digits next week. If this happens, we could see the earliest record for 100 degrees shattered! It’s a stark reminder that while spring is a time for renewal, in Phoenix, we’ve got to be ready for some serious heat as well.

So, Phoenix, it’s time to prepare! Stock up on water, sunscreen, and stay cool. The warm days are just around the corner

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STAFF HERE PHOENIX WRITER
Author: STAFF HERE PHOENIX WRITER

PHOENIX STAFF WRITER The PHOENIX STAFF WRITER represents the experienced team at HEREPhoenix.com, your go-to source for actionable local news and information in Phoenix, Maricopa County, and beyond. Specializing in "news you can use," we cover essential topics like product reviews for personal and business needs, local business directories, politics, real estate trends, neighborhood insights, and state news affecting the area—with deep expertise drawn from years of dedicated reporting and strong community input, including local press releases and business updates. We deliver top reporting on high-value events such as the Waste Management Phoenix Open, Cactus League Spring Training, and Arizona State Fair. Our coverage extends to key organizations like the Greater Phoenix Chamber of Commerce and Visit Phoenix, plus leading businesses in technology and healthcare that power the local economy such as Intel and Banner Health. As part of the broader HERE network, including HERETucson.com, we provide comprehensive, credible insights into Arizona's dynamic landscape.

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