Phoenix is waking to around 90°F Monday morning, with another furnace-blast afternoon ahead and a high near 107°F. The heat index could reach 111°F, and the first slight chance of showers or thunderstorms arrives after 5 p.m. The overnight low will only fall to about 86°F.
The storm setup comes with a serious wind and dust risk. Strong storms Sunday night produced gusts of 60 to 80 mph in parts of south-central Arizona, and any surviving cells Monday evening could send sudden outflow winds, blowing dust and brief heavy rain into the Valley.
Storm Chances Build Tuesday Through Thursday
Tuesday will be a little cooler at about 103°F, but the chance of thunderstorms returns after 5 p.m. Tuesday night carries a 50% chance of showers and storms, with mostly cloudy skies and a low near 85°F.
Wednesday looks like the wettest and coolest part of the stretch, with a high near 100°F and a 50% chance of showers and thunderstorms during the day and night. The National Weather Service Phoenix office says deeper moisture could make brief heavy rain and localized flash flooding a bigger concern through the middle of the week.
Thursday should remain unsettled, with a high near 99°F and a 30% chance of storms. Rain chances then drop sharply Friday, when Phoenix is expected to turn mostly sunny with a high near 102°F.
Dust And Extreme Heat Still Matter Monday
Winds will run 5 to 10 mph from the southwest during the day, then shift west-southwest tonight with gusts up to 20 mph. If storms push dust across roads, drivers should slow down, increase following distance and pull off the roadway if visibility suddenly collapses.
For people who need a break from the heat, the City of Phoenix lists free cooling centers and hydration stations. The city says no identification is required, and water is available at its heat-relief locations.
After the midweek cooldown, temperatures rebound to about 105°F Saturday and 107°F Sunday, with storm chances staying low. The Extreme Heat Warning listed in the forecast package applies to the Lower Colorado River Valley and western Imperial County, not central Phoenix, but Monday’s heat is still enough to make strenuous afternoon activity risky.
