NWS Phoenix

News Headlines

This Day in Weather History

Click a location below for detailed forecast.

Last Map Update: Sun, Aug 16, 2026 at 6:52:44 am MST

Watches, Warnings & Advisories

National Weather Service NWS Flagstaff, AZ

Zoom Out

National Weather Service Albuquerque, NM

National Weather Service NWS Tucson Arizona

Extreme Heat Warning

Hot Temperatures All Week

A strong high pressure system will shift back over the Desert Southwest early this week leading to hotter temperatures and overall fairly dry conditions. This system is expected to persist over the region all week, with at most day-to-day high terrain monsoon activity across eastern Arizona. Starting Monday, temperatures will rise to around 5-7°F above average as Major HeatRisk developing across the lower deserts. An Extreme Heat Warning is in effect for the lower deserts of AZ and southeast CA for Monday through Friday.

Temperatures will rise to above normal starting Monday with daily highs across the lower deserts between 109-113°F Monday-Friday. Overnight lows will also warm well into the 80s to as warm as the lower 90s in central Phoenix. Areas of Major HeatRisk also return by Monday and forecast to last through the entire work week. Extreme Heat Warnings are in effect for much of the area Monday-Friday.