Low 80's is not cold. It is definatley shorts weather, so is 70's. It is however subject to where you are from and what you are used to. .
Totally agree with this! I have spent my whole life in Arizona, so 70's and 80's used to be a bit chilly. Then I went to live in Alaska for a year, yea if its in the 30's people are wearing shorts!
October in Florida, I would wear capris or shorts, just my opinion.