Some of us city folks have been exposed to cold weather before.
Even with wind, I don't think I'm freezing at 45 F.
Yes, that was my overall point. All of this fret and worry about "freezing nights" at Burning Man. Most nights are about 50Âº. Even at its coldest, there is not really any risk to someone with a jacket or a sleeping bag. And most people go to bed well before we hit the coldest part of the night.
However, if your city made a 45 degree swing in temperatures (80Âº daytime to 35Âº nighttime), that would be amazing. Everyone's body acclimates to the average high out there, but then it gets shocked by the big drop. To some, it feels much colder than the true temp, because they have "tuned" their body to days in the 90's.