What's crazy is to hear people down here start griping when it's in the 60's. The freakin 60's, aka the perfect temperature range. "Oh, it's cold. When are we gonna get a warm up?" Death to every one of them. I work outside without a jacket in the 30's. I love it. I sorta don't fit in with the majority here with my opinion on weather.
55. 55F is the perfect temperature. I like late fall and early spring around here for that reason. That temp where you can wear anything you want. I too work outside in a t-shirt when it's in the 30s and 40s, when everyone else here is wearing scarfs and heavy coats (hell, they wear heavy coats in the 50's, wtf?)