Phoenix woke up to mostly clear skies and a toasty start this morning, with temperatures already around 81°F at Sky Harbor, and the real sizzle is still ahead for Tuesday, May 12, 2026. The National Weather Service is calling for afternoon highs near 106°F and has an Extreme Heat Warning in place through 8 p.m. With low humidity and light winds offering almost no help, many neighborhoods will see little relief during the hottest hours, raising the risk of heat-related illness for anyone working or exercising outside. If you can, shift the hard stuff to the early morning or after dark.
What To Expect Today
Skies stay sunny and the air stays dry, with south winds generally around 0–5 mph. That light breeze will do little to slow the warmup after midmorning, and most of the metro is expected to top out between 105–107°F. The current warning highlights a "major" heat risk, including limited overnight cooling in many areas. According to National Weather Service Phoenix, the Extreme Heat Warning runs through 8 p.m. Tuesday.
Heat Safety And Cooling Resources
If you do not have reliable air conditioning, the Heat Relief Network in Maricopa County keeps a running list of cooling centers, hydration stations and transportation help. You can call 2-1-1 to find nearby locations and rides. Many libraries, community centers and faith-based cooling sites operate from May through September and extend hours during extreme heat events. For maps and the latest locations, visit Maricopa County.
Short-Term Outlook
Forecasters are eyeing a modest cooldown starting Wednesday, with highs easing into the upper 90s as the ridge shifts east. Relief will be slow and conditions will still be warm for late spring. Overnight lows stay on the warm side too, so anyone without AC should plan for persistent heat through the weekend. According to National Weather Service Phoenix, the hottest readings should back off after Wednesday, although another 100°F day is still on the table later in the week.
How To Stay Safe
Take frequent breaks in cool, shaded or air-conditioned spots, sip water regularly and avoid long workouts during the afternoon peak. Keep an eye out for signs of heat exhaustion or heat stroke, including heavy sweating, dizziness, nausea or confusion. Call 911 for anyone who becomes disoriented or faints. Check on older neighbors and people with chronic illnesses, and keep pets indoors or in deep shade with plenty of fresh water.
