years ago my friends and I always thought we were doing well to "ride the temperature" in the winter- anything less than 0F meant we got together at a pub and didn't ride. Now, like many in BF, I seek out those frigid days. Maybe I'll change it to anything below 0F ride the number of miles below zero- ie. -10F means 10 mile ride. anything above zero will have to be doubled.
You have set the bar. Congrats.