For me, it was 3 F when I left out. I wore:
Performance Triflex tights, with the performance rain pants over that
SPD sandal with hydrosocks, and toesies over the sandal, and booties over everything
long sleeve cycling shirt
Fleece sweatshirt
Gore tex windbreaker
Baclava and skull cap
fleece neck scarf
liner gloves
lobster mitts
Koffee