We always advocate learning
We always advocate learning your barefoot running form first, then only don footwear when needed. We also realize that learning your proper barefoot running form in the winter is difficult due to numb feet not receiving the proper signals from the ground. It's better to run safely than it is to risk injuring yourself. In extreme case, when the ground is just to cold otherwise, why not just run in a pair of socks? You can get a bunch at the dollar store. I was able to get about 5 five mile runs out of each pair. Also, you can try warming your feet up before you head out for a run in your socks, then after a mile or two, take your socks off and see if you can tolerate the cold without your feet going numb. This works for some people. It might work for you too. Then on warmer days, at the warmest part of the day, and when spring comes you will be able to run barefoot much more safely.
We always advocate learning your barefoot running form first, then only don footwear when needed. We also realize that learning your proper barefoot running form in the winter is difficult due to numb feet not receiving the proper signals from the ground. It's better to run safely than it is to risk injuring yourself. In extreme case, when the ground is just to cold otherwise, why not just run in a pair of socks? You can get a bunch at the dollar store. I was able to get about 5 five mile runs out of each pair. Also, you can try warming your feet up before you head out for a run in your socks, then after a mile or two, take your socks off and see if you can tolerate the cold without your feet going numb. This works for some people. It might work for you too. Then on warmer days, at the warmest part of the day, and when spring comes you will be able to run barefoot much more safely.