Phoenix is kicking off Sunday, June 21 under crystal-clear skies with a high near 105°F — and the National Weather Service warns that’s just the beginning of a serious heat event. Get your outdoor plans done before 9 AM, stay hydrated, and know that conditions get significantly more dangerous through Thursday.
Today’s Setup
A subtropical high pressure system is pushing northward into Arizona, replacing the cooler trough that gave us a brief break over the past few days. South winds stay light at 0 to 5 mph, skies remain clear all day, and there is zero chance of rain. Tonight’s low only drops to around 78°F — don’t count on much overnight relief even with the windows open.
Best Window To Be Outside
Before 9 AM is your golden window. Hikers heading to Camelback Mountain or South Mountain should be on the trail at sunrise and back to the car before the heat takes hold. Golfers: early tee times only — conditions become dangerous by mid-morning. A Stanley tumbler 40oz packed with ice water is non-negotiable out here. When the heat peaks, a pool day is the smart call — there’s a great deal right now on a 2-Person Intex Floating Lounge with Cooler for just $24 on Amazon.
Heat Risk This Week
This gets serious fast. Monday’s high reaches 108°F, pushing most of the Phoenix metro into Moderate Heat Risk. By Wednesday and Thursday, the National Weather Service is forecasting 110 to 114°F across the lower deserts, with localized Major Heat Risk possible. Even overnight temperatures are brutal — Monday night stays near 83°F in the Valley. Check on elderly neighbors, never leave kids or pets in a parked car, and keep strenuous outdoor activity limited during peak hours (11 AM–6 PM MST).
D-Backs at Chase Field Today
The Arizona Diamondbacks host the Minnesota Twins today at Chase Field, and it’s going to be a scorcher heading in and out of the ballpark. Dress light, bring water, and gear up in an Arizona Diamondbacks jersey or an Arizona Diamondbacks fitted cap to represent in the Arizona sun. Still need seats? Get tickets on SeatGeek or Find tickets on StubHub.
Tonight’s Events
Khalid: It’s Always Summer Somewhere Tour plays Arizona Financial Theatre tonight — a perfect air-conditioned escape on a 105°F evening. Later this week, A$AP Rocky brings his Don’t Be Dumb World Tour to Mortgage Matchup Center on June 23. Grab an A$AP Rocky t-shirt and Get tickets on SeatGeek before the show sells out.
Father’s Day Grill Night
Happy Father’s Day — tonight after sunset is your best window to fire up the grill. Cook burgers, steaks, or grilled chicken with corn on the cob. A Father’s Day grilling set makes the perfect gift, an instant-read meat thermometer takes the guesswork out of your cook, and a grill brush and scraper set keeps things clean and safe. Need supplies? You can order groceries on Amazon and have everything for tonight’s dinner delivered to your door.
Next Few Days
Sunday night: mostly clear, low near 78°F. Monday: sunny and 108°F with humidity beginning to creep in. Tuesday through Thursday: dangerous heat peaking at 110–114°F with Major Heat Risk possible across the lower deserts. A cooling trend is expected to begin Friday. Track it daily at the Phoenix weather forecast — this is the kind of week that demands your attention.
