I posted earlier about living in WI. Once the temperature hits the zero degree mark, it all feels the same, but the danger of frost bite increases. I did use zero as my cutoff temperature for running outside.
You lose most of your heat from your head, so a hat is important as the temperatures drop. Next comes the gloves. You may be running in shorts, hat, and gloves before you start wearing longer clothing to cover legs and arms. Living in cold climates, you learn to dress in layers.
Slather your face in Vaseline to protect against the cold and possible frostbite.
I lived a mile from the factory where I worked. People would laugh at me because I walked to work. I was home before most people had windshields cleared.
There’s plenty of exercise shoveling snow. Never knew how deep it was since it froze so quickly. It’s important to shovel the snow off the sidewalks and driveways within a half hour, or it will freeze solid.
Greenfields-- I agree that it is easier to exercise when it is a natural part of your day than something you “plan for.” It becomes a natural part of the rhythm of the day like morning prayer. Autumn seasonal wood cutting is part of the natural rhythm of your year.