Phoenix weather today is sunny and 101°F, with a high near 101 degrees and light south winds at 0 to 10 mph. This is perfect weather for outdoor activities—but you’ll want to get ahead of the dangerous heat building this weekend. The National Weather Service has issued an Extreme Heat Watch for Sunday and Monday, when temperatures could peak between 105 and 110 degrees across the lower desert.
Today’s Setup
Upper-level ridging is spreading across the region, pushing an upper-level low eastward into west Texas. Skies will remain completely clear, and very dry air means overnight temperatures will cool to a pleasant 72°F tonight. This is classic early-May Phoenix weather: hot days, mild nights, zero rain. Humidity will stay low, so the heat feels more tolerable than it will be Sunday and Monday.
Best Window to Be Outside
If you’re planning to hit the links, head out early—morning tee times at courses around Camelback Mountain or South Mountain Park will be ideal before the heat peaks. Grab a UV protection sun hat and golf shorts men to stay protected. The Arizona Diamondbacks face the New York Mets at Chase Field tonight and Saturday; if you’re catching the game, arrive early and enjoy the clear skies. Get tickets on SeatGeek or Find tickets on StubHub, and consider an Arizona Diamondbacks jersey or Arizona Diamondbacks fitted cap to show your support.
For concerts and events, conditions are excellent: Two Feet: The Next Steps Tour and Florence + The Machine - Everybody Scream Tour are happening tomorrow night at The Van Buren and Desert Diamond Arena—perfect outdoor festival weather before the heat intensifies.
Extreme Heat Alert: Sunday & Monday
The forecast discussion from the National Weather Service indicates a stronger subtropical ridge will build across the eastern Pacific and shift eastward into our region Sunday into Monday. Upper-level heights will peak near the 99th percentile of climatological records—that’s dangerous territory. Widespread moderate HeatRisk is already in effect today through Saturday, with isolated major HeatRisk expected early next week. Monday should be the warmest day, with lower desert highs between 105 and 110 degrees.
If you have outdoor plans Sunday or Monday, reschedule them to early morning (before 10 AM) or evening (after 7 PM). Stay indoors during peak heat hours, drink water constantly, and check on elderly neighbors and pets.
What to Wear & Bring
Today and Saturday, a UV protection sun hat is essential. Lightweight, light-colored clothing will help reflect heat. Sunscreen (SPF 30+) is non-negotiable. Bring a water bottle—not just a sip, but a full liter. If you’re grilling tonight, an instant-read meat thermometer ensures your steaks and burgers reach safe temperatures quickly, and a grill brush and scraper set keeps your propane gas grill in top shape.
Grilling & Dining
This is perfect grilling weather. Fire up the grill for burgers, steaks, or grilled chicken with corn on the cob. You can order groceries on Amazon and have everything delivered—grab a quality instant-read meat thermometer and grill brush and scraper set to make prep easier. The mild evening temperatures (72°F tonight) are ideal for eating outdoors on a patio furniture set under outdoor string lights.
Next Few Days
Saturday stays sunny with a high near 103°F and light south-southeast winds. Sunday and Monday are when the real heat arrives—be prepared. By Tuesday, conditions should begin to ease slightly as the ridge flattens. Clear skies continue through the weekend, so no rain is expected through at least mid-week.
