A couple of days ago we had about 5 inches of snow, and I was hoping the Parkway path would have some snow and ice on it so I could test my ice shoes. The path, however, was mostly bare, and I didn't use the ice shoes. The temperature during my run was in the low teens (F), but most of the path is in the sun and is warmer due to the sunlight shining on the path. I had a great winter run. I stopped at 1.5 miles, because my wakeup pulse rate is high, and I didn't want to put a lot of stress on my body.
I wore three layers (T-shirt, long sleeved T-shirt, and nylon windbreaker) my light cotton gloves, and a wool cap. I felt fine during the run except for my hands. I need to get some warmer gloves or mittens. When I was younger, the cotton gloves were fine, but I'm older now and probably don't have good circulation in my hands.