Winters are what make Tucson famous. rarely do we get bad winter weather while most of the rest of the country is socked in under feet of snow. \
I think we dropped to 17 degrees back in 2013. Hardest freeze I can remember in my 40 years here.
A neighbor and myself had frozen pipes, and her external pipe burst. Had to get the Mrs hair dryer and a 100 foot extension cord to warm up her main valve enough for me to turn it off. Got a plate of brownies the next day as reward!