Clear skies and a warm Sunday start are setting Phoenix up for a toasty stretch. On May 31, 2026, temperatures are around 73°F at Sky Harbor this morning, with the afternoon high forecast near 98°F. Overnight lows will hang in the low 70s, offering only a short breather before the heat ramps up again. Through the rest of the week, afternoons are expected to surge back into the low 100s.
Afternoon Temperatures
Monday, June 1, is projected to hit about 102°F. From Tuesday, June 2, through Thursday, June 4, highs should generally top out near 103°F. Friday and Saturday are not far behind, with highs forecast near 101°F. Nights stay on the warm side, with most overnight lows in the mid-70s, and winds remain light at 0–5 mph.
Heat Impacts
Dry air and light winds will keep daytime humidity down around 5–10%. That combination can make the sun feel more intense and can slow the rate at which things cool off after dark. Forecasters are calling for isolated moderate heat risk across parts of the lower deserts, including stretches along the Lower Colorado River, so it is smart to avoid strenuous outdoor work during the hottest hours of the day. People with medical conditions, young children and anyone who works outside should plan around the afternoon peak.
Where To Find Relief
If you need a break from the heat, the City of Phoenix keeps an updated list of cooling centers and extended-hour sites, according to City of Phoenix. For a broader view, the regional Heat Relief Network map shows cooling centers, hydration stations and respite sites across the Valley. Locations and hours are detailed by Maricopa County.
Quick Tips
Hydrate frequently, shift yard work and workouts to early morning or evening, and check in on neighbors, older adults and pets during peak heat. Never leave people or animals in parked cars, even for a short stop. If your home loses power, remember that cooling centers are available as a backup plan.
Current Advisories
There are no heat watches or warnings in effect for the Phoenix metro for now, although forecasters expect conditions to stay uncomfortably hot through the workweek. This forecast will be updated if any advisories are issued.
