This is a 20 - 30 degree outfit that I wore to run about 6 miles a couple weekends ago. From top to bottom, I'm wearing a fleece headband, a long sleeved tech shirt under a thicker long sleeved shirt, heavier gloves, fleece-lined tights, regular socks and shoes.
If you are looking for tights (I transition to wearing tights sometime in the 20-30 degree range depending on the wind chill factor) I highly recommend the Sugoi SubZero tight. Yes, they are pricey, but I bought this pair 3 years ago, and I've worn them MANY times each winter. Fleece-lined tights are the way to go not only because they are warmer, they are thicker which makes them less revealing (I know some people don't like tights for that reason). Despite the name, I would wear an additional pair of athletic pants over these if I were going to run when it's around 0 (about the lower limit of my comfort zone).
Happy pre-Thanksgiving. Safe travels to all. Wish me good luck getting stuff done at work so I can take Friday off!