Hey - welcome to our winter world!
I managed a much shorter ride than you did today, and my ride was pretty much flat, so I didn't have the downhill extra wind chill to deal with. But the temp was 24 degrees when I headed out, and while the wind has settled down somewhat in comparison with yesterday, it was still blowing. 15 miles was enough today. And since I knew how cold it was, I did several small loops so I was never too far from home. And I know there are some gals here who ride in even colder temps - my lower limit is the low to mid-twenties (I know, what a baby!).
It sounds like you had a good ride even though it was cold.
--- Denise