Mean temperatures in June have been a little above average since 1895
Maximum temperatures have been a little below average.
The frequency of hot days has been about average.
I started at ASU in 1974, the peak year of the ice age scare. Phoenix had nineteen consecutive days above 110 degrees during June and early July, their all-time record heat wave. And we had no A/C in the fraternity house, just swamp coolers.