Come on guys. This cold snap isn't nothing. I've lived through 110+ days while in PHX, and that wasn't bad at all. Moved back to CO in 1997 so I could get some good seasons. During winter, we can have a good number of days below zero. While during the summer we have a good number of days above 100. Get the best of both ends of the spectrum. When moving back to CO, it did take a while for my blood to thicken back up to withstand the cold fronts coming in.
Here in Denver, we were in the mid 60's on Saturday, then 45 on Sunday, down to the single digits on Monday, and not above -1 yesterday. So we know all about the quick changes in weather.