thanks for asking! I'm above 4500 ft elevation, so it never gets 120 here, but I've lived in Tucson as well, and it does there. This morning when I woke, it was 49F. Right now it's 94. I know people who ran their furnace and A/C both today already. (I like 49 with open windows and a blanket, so I was fine.) Even in June, our hottest month, nights will get down to 60F. Sleeping with windows open and fresh air is really nice.
You know now, in Phoenix, nearly every year it gets so hot for a few days here and there that planes can't fly. That just stuns me, every time I think about it. You can't get them off the ground because air isn't dense enough.