Phoenix woke up already warming fast on Sunday, June 21, with clear skies, very dry air and temperatures in the upper 70s at Sky Harbor as neighborhoods started heating up early. The National Weather Service is calling for mostly sunny skies today with a high near 105°F, a light south breeze and virtually no shot at rain.
Hotter Midweek
The real sizzle rolls in over the next few days. Monday, June 22 is expected to top out around 108°F, Tuesday should reach near 110°F, and forecasters say the hottest stretch hits Wednesday and Thursday, June 24–25, when parts of the lower deserts could see 111–112°F, according to NWS Phoenix. That bump in temperatures nudges much of the Valley into a Moderate Heat Risk by Tuesday and brings pockets of Major Heat Risk by midweek as overnight lows stay stubbornly warm. In other words, expect punishing daytime heat and very little relief after dark across the metro.
Cooling Options and Safety
If your air conditioning is unreliable or you just cannot keep up with the heat, local partners maintain a network of places where you can cool down. The regional Heat Relief Network offers an interactive map of cooling centers, hydration stations and respite sites; call 2-1-1 or check the Heat Relief Network to find the nearest spot and current hours. The city also operates a downtown 24/7 respite site and has extended library hours this summer to give people options for overnight or evening relief.
What To Watch For
Beyond the triple digits, afternoons are expected to turn breezier later this week, with gusts in the 20–25 mph range and minimum humidities that keep the heat hanging around overnight. That combo raises fire-weather concerns and makes outdoor labor especially risky during peak afternoon hours. Shift strenuous work to early morning or evening whenever possible and keep plenty of water within reach. If anyone in your household depends on powered medical equipment or is elderly, line up backup plans now and keep an eye on updates from your utility and city agencies.
Bottom line: highs climb solidly into the triple digits through the week, and parts of the metro could touch the low 110s by midweek. Stay cool, use the Heat Relief Network if you need a safe, air-conditioned place and keep tabs on neighbors, pets and outdoor workers during the worst of the heat.
