I live in SE Florida.....99.9 percent of the time a sweater or jacket is NOT required. Last night and looks like tonight, a sweater or jacket will be worn...along with long pants instead of shorts. How can anyone predict the weather for next week??? Odds are a sweater will NOT be necessary...but since it is calling for only in the 60s in Florida for most of the week.....chances are the cool front could reach down into the Caribeann. Not necessarily 60s there, but a bit cooler weather may be happening. It's not unusual when the winds blow just the right way and bring down a cool front!!!!