NWS Phoenix

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Last Map Update: Sat, Jun 28, 2025 at 3:10:35 am MST

Watches, Warnings & Advisories

National Weather Service NWS Flagstaff, AZ

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National Weather Service Albuquerque, NM

National Weather Service NWS Tucson Arizona

Extreme Heat Warning

Air Quality Alert

Hazardous Weather Outlook

Extreme Heat Warning

Weather Outlook

Monsoon Pattern Next Week

Heat Safety

An Extreme Heat Warning is in effect Sunday through Tuesday, with the warning Sunday and Tuesday in effect for just the Phoenix area and for Monday expanded to include the rest of the lower deserts of south-central and southwest AZ through portions of southeast CA as well as the San Carlos area in southern Gila County. High temperatures during these days are expected to range between 108-116 degrees with overnight lows in many areas remaining above 80 degrees, resulting in areas of Major HeatRisk.

Temperatures will steadily climb through early next week over the region with readings exceeding 110 degrees. These temperatures will result in widespread Moderate HeatRisk, with areas of Major HeatRisk developing as early as Sunday. Heading into next week, an increase in moisture will lead to increased storm chances starting as early as Tuesday across the AZ higher terrain. Storm chances will then increase by the latter half of the week across the lower deserts of south-central AZ. With the increased moisture and storm chances, cooler temperatures are expected during the middle and latter half of the week.

The monsoonal high will set up near the Four Corners region early next week resulting in daily thunderstorm activity. The highest storm chances will be primarily confined to the high terrain early in the week, but increasing moisture will result in increased storm chances across the lower deserts of mainly south-central AZ between Wed-Fri.

As temperatures start to warm ensure you are following proper heat safety tips. Stay hydrated, wear cool/light clothing, wear sunscreen, and if possible stay in the shade or inside.