PHOENIX (3TV/CBS 5) - The first major heatwave of the year is going to hit hard beginning Sunday. One of the reasons it will be so brutal is we haven’t been above 108 so far this year. By this time last year, we’d already had four days above 110 degrees. We were getting acclimated to the hotter temps. This year, we really haven’t had a lot of really hot days, 19 above 100, so when this hits, it will hit hard.
Beginning Sunday, we expect a high of 111 degrees. And we’ll just get hotter. We expect highs over 110 for all of next week and perhaps even into next week. In the middle of all of that, we’ll have a couple of days where we make a run for 116 or maybe even 118. The 118 is more of an outlier forecast, but it’s certainly a possibility at this point. After next Saturday, temperatures will moderate and we’ll drop out of the 110s for several days at least.
We like to call it “the pain before the rain” because we almost always have to go through a major heatwave or two before the monsoon begins to return to Arizona. Last year, we just got pain with Monsoon 2020 being called a failure across all of the state except southern Arizona. This year, we’re fairly confident the monsoon won’t be as bad as last year, but still, expect below-average rainfall for the Valley.
By the way, the average first 110-degree reading in the Valley comes on June 11. Believe it or not, there was a year, 1911, when a temperature of 110 or higher was not recorded in Phoenix. That’s the only time that’s happened and it begs the question, how good were the weather readings in those days?