It's possible some 49-50 degree days occurred in isolated spots but that is pretty cool for this time of year.
When I lived over 4k feet, it was pretty unusual to have a mid-40's high or cooler in May.
PHX is too hot for me. Tucson is more my pace. A quick escape to the Mt. Lemmon and it’s cool and green. Our family is just on the outskirts of the National Saguaro Forest. Plenty of wildlife and a little snow in the winters some years.