NWS Forecast Office Phoenix, AZ

There will be an increase in tropical moisture at the end of this week which will result in increasing shower and storm chances. Best chances will be across eastern and southeastern Arizona, but there is a 30-60% chance of storms surviving into the lower deserts of south-central Arizona.

Thunderstorm chances return to the region, including the lower deserts, tby the end of the week and into the weekend. Better chances will initially be across eastern and southeastern Arizona before expanding westward. Storms may be slow moving and may move over the same locations causing flash flooding concerns.

With August wrapped up we can now take a close look at how August fared. Phoenix came in 4th for the hottest August on record, meanwhile El Centro tied for the warmest, and Yuma came in as the hottest August on record. Additionally the average high temperature was 4-6.4 degrees above normal, and the average low at each site was between 7-9 degrees above normal. The only factor that was not above normal was the precipitation totals, however Phoenix was only 0.03" below the normal.

With August wrapped up that also concludes the meteorological summer season (June-August). Phoenix tied for second hottest, while Yuma and El Centro came in at the 2nd hottest summer on record. The average high, low and mean temperatures were all several degrees above normal, while precipitation totals were below normal.