It's warm...for November

I get that it's in the upper 50's and it's really sunny outside, but it's November, not April. I cannot stand when girls are walking around on campus wearing tank tops and flip flops because it's warm for 5 hours of the day. As soon as the sun goes down, it's freezing out, so this just says to me that I probably should keep all my summer clothes in their box until it is actually summer again....