We’re a few days into the hottest heatwave for metro Phoenix so far this year. Saturday, we topped off at 110. Sunday was 113. Monday, as of the early afternoon, most Valley locations were running above 110. It’s just a matter of where we end up for the day.
Tuesday, we’re expecting the hottest day of the week with a 117. That will, of course, set a record for the date. After that, we should be around 115 for Wednesday and Thursday and then 116 is in the forecast for Friday. After that, we start the moderation, if you will. Saturday’s high will be around 114. Sunday, we’ll be at 111 and next Monday, we’ll drop down to 108.
The first day of the monsoon, per the calendar, is Tuesday, June 15. However, we don’t expect any rain around the state at all. As you know, the start day is just an artificial date to kick off the monsoon, with an end date of Sept. 30. It helps with record keep, and it covers the entire state better than the “legacy” definition of the monsoon arriving, three-straight days of dewpoints of 55 or higher. The legacy definition still works pretty well for the Valley, but really has little meaning outside of metro Phoenix. Tucson, by the way, used to use three straight days of dewpoints of 54 or higher.