Im from Los Angeles. I think the coldest I've ever been working on my car in was like 70 degrees. In all honesty I dont think I've ever had to work on the car in such a condition so bad I remember that specific detail
This past winter was one of the coldest I can ever remember here in Chicago. Got a flat driving my dads truck late at night so I parked it and came back the next day. -15F with my knees in the snow trying to jack this thing up. I had icepicks coming out of my nose lol
On the other end of the spectrum... You have not been through hell until working on a car midday during the summer in sticky Florida humidity. By the time you get the damn car on stands and the wheels off Im drenched in sweat.