Todays participants: Mitch, Dimitri, Jeremy, Stephen, and Brandon. March 12 in Pottstown, Pennsylvania . Air temperature this morning was 40°F and water temperature was about 45°F . Dimitri is a first time plunger But took it like a man! Jeremy shares his thoughts on how to build a cold tub for the summer. We discussed why we adjust our clothing at different temperatures in the fall and spring.