First really cold commute. In the mid 20s when I left. The high today is only 41, so it will be cold coming home too.
I supplemented my normal cold weather outfit (long-sleeve under-armour shirt, track pants) with a hooded sweatshirt, gloves, and my facemask I use for skiing (covers from the nose/cheekbones all the way down my neck).
I got a little warm by the end of it, but not sweaty. I think I may leave the facemask off on the way home, depending on how cold it is.
It will also be my first darkish commute tonight. I hope my lights are enough (blinky in the back, headlight in the front). I have a reflective yellow vest, so cars should be able to see me okay.