We were at HS. Definitely seemed a little less crowded than Monday was for the morning hours and evening hours, as I think a lot of people didn't want to brave the cold for long hours. I wore 4 layers, a camisole, long sleeve t, short sleeve t, and a cardigan over that that I could take off. I was a little chilly, but not unbearable. A sweatshirt might have been a better choice, but I wanted wear my R2D2, short sleeve shirt--fashion over comfort.
I also was wearing black and that really helped soak up the sun and help keep me warmer too, so darker colors are a plus if it is cold and sunny.
If you are able to get ANY indoor reservations for lunch, do it. I was so glad we had Sci Fi. I was feeling bad for the families trying to eat their lunch in the breeze outside. That did not look fun.