Phoenix started Thursday, June 4, 2026, in the low 80s, but the real heat kicks in this afternoon. Highs are expected to top out near 108°F, with overnight lows only slipping into the upper 70s. Very low afternoon humidity will make the sun feel even more intense than the temperature suggests, so it is best to plan outdoor plans for early morning or evening.
High Heat Through the Afternoon
The National Weather Service in Phoenix projects a high near 108°F across the metro today, with about a 10 to 15 percent chance that official climate sites briefly hit 110°F this afternoon. Skies should stay mostly sunny while temperatures ease only gradually, with lower-desert highs sliding back toward the low 100s by Sunday, June 7, 2026.
Where to Find Relief
The City of Phoenix and regional partners have seasonal cooling centers and hydration stations open, including a 24/7 downtown respite at 20 W Jackson Street. Check the City listings for current hours and transportation options if you lose power or just need a place to cool down. Many of these locations operate as part of the regional Heat Relief Network.
Afternoon Winds and Fire Weather
The National Weather Service also expects winds to strengthen later in the week, with gusts of 25 to 30 mph possible on Friday, June 5, and Saturday, June 6. Stronger gusts are most likely near the Lower Colorado River Valley and in higher terrain. With afternoon humidity dropping into the 5 to 10 percent range, those winds could create periods of elevated fire weather and make any isolated dry thunderstorms over eastern terrain more problematic.
Quick Safety Tips
Drink plenty of water, skip strenuous outdoor work during the midafternoon peak, and secure loose outdoor items before the gusty periods arrive. Never leave people or pets in parked cars. If you or someone around you shows signs of heat illness, move to a cool area and call 911.
For background on the Valley’s early jump into triple digits and a map of relief sites, see our June 1 coverage Phoenix Sizzles Back Into Triple Digits. We will update this forecast if any heat watches or warnings are issued for the metro.
