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Last Map Update: Wed, Aug 5, 2026 at 7:24:25 am MST

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National Weather Service NWS Flagstaff, AZ

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July Climate Summary

Another complex of strong thunderstorms is expected to develop across eastern AZ this afternoon and evening. This complex of thunderstorms is expected to push gusty winds westward into the Phoenix valley. The main hazard will be strong gusty winds (> 35 mph). If the outflow come more out of the SE areas of blowing dust will also be a concern. There is a low chance (<15%) of showers and storms forming along the outflow in the lower deserts.

Temperatures will cool slightly through the first half of the week, but still remain above normal. Additionally, increasing moisture tonight into tomorrow will lead to increasing "feels like" temperatures. Lower desert locations will have "feels like" temperatures in the range of 110-120°, with the highest reading across SE CA and SW AZ. Storm chances will be mainly confined to the higher terrain areas of eastern and southeastern AZ through the majority of this week. Storm chances will increase across the lower deserts by the end of this week, with better chances heading into this weekend.

Extreme Heat Warnings are in effect through Friday across all of the lower deserts. Major HeatRisk continues. Temperatures fall only slightly midweek, only to climb again for late week. Increased humidities will make it feel even hotter.

Dangerously hot temperatures are in the forecast through at least the weekend. Make sure to take the proper precautions to protect yourself from the heat, it is the deadliest weather-related phenomenon.

All three official climate sites (Phoenix, Yuma, and El Centro) had above average temperatures & below normal precipitation this July. This July was also the 5th hottest on record for both Yuma and El Centro and was the 6th hottest on record for Phoenix.