For the tourists from a country or part of the world where the metric system and Celsius temperature scale is used, it's not always that easy to know the exact Fahrenheit temperature in centigrades. In the summer it's not that hard to know what to wear in Florida, but in the cooler months, temperatures can vary per day. One day it's 80 degrees Fahrenheit (26 degrees Celsius), the other day it's only 65 degrees Fahrenheit (18 degrees Celsius). That's when you know you'll need a sweater or long trousers.
To make it a little bit easier, here's a Fahrenheit - Celsius converter, which works both ways. Just enter the temperature and it will convert it instantly, while you type!