I have a question for the northern folks. I have extremely limited indoor space and about 60 kids per P.E. class. Therefore I go outside whenever I can. I live in the South, so people down here think it's cold at 45 degrees. I get flack from people for taking my kids outside in 30-40 degree weather for 25 minutes, even though I'm comfortable outside all day. Now for the question. At what temperature do you folks in the north consider it too cold to go outside for recess (or P.E. if you don't have adequate indoor facilities)?