Shouldn't this "I live in worse weather than you" contest be decided by who lives in the area with the largest variance between Winter and Summer, rather than just how hot it gets in Summer, or how cold it gets in Winter?
For example, someone who lives in a place where it's 30-100 (a range of 70) would win against someone who lived in a place where it's 50-115 (65) even though the latter is 15 degrees higher in Summer, because the former would have a bigger range for his/her body to adjust to, making the highs in Summer and the lows in Winter subjectively harder to bear.
This may, of course, still favor Thad as the person with the biggest right to complain. I have no idea how cold it gets in Arizona/Phoenix. And regardless, extreme highs/lows still have some merit, obviously.
I do know that my personal variance is around 60-65. I'm sure some people here could beat that. I'm not even interested in complaining, because I never really mind the weather/heat/cold due to my titanium exoskeleton undead nature cushion of dead babies alien physiology psychic projection field nanobots tits.
Anyway, no cheating by using night lows in the winter. You're not outside at 3 in the morning. Unless you are. In which case, you have my sympathy.