Enjoy the appropriate amount of a/c on your train in, despite the crowds
Start to question if you did dress appropriately when you arrive
Decide all together, yes, you did dress inappropriately for the weather and that you must find all the old winter clothing you never bothered to take home and completely encase yourself in wooly goodness.
Around 3:00PM, find that whatever cold based Batman villain that had been roosting on your doorstep looking though your mail and messing up your garden has departed and that you can remove the flannel without fear of frostbite.
After removing all extra layers, leave the office and feel pretty ok about your fashion choices.
Later, regret taking the numbing cold for granted as you begin to worry that you already found all the cold spots in your bed.