It's two degrees right now.
That's all I have to say.
Edit at 8:30 AM, two hours farther into the day.... It's now -2. I almost did a T-9000 impersonation on the way into my office this morning crossing the parking lot. My mustache froze solid walking 50 feet.
I have been out in colder weather, but not recently and not so close to T-Shirt weather for years. These are the kind of winters I remember from when I was a kid. Waiting for a week long ice storm now.
On a totally unrelated note, I love my new Carhartt.