According to the Weather Channel, Orlando's average temps for the weekend we'll be there are low 70s during the day and low 50s overnight. We'll see the actual forecast when it gets closer!
So remember, it may be Florida, but it's only February! Be sure to bring something slightly warmer for the eveings (and for the morning balloon ride, if you're doing that).
Us Northerners have been in the deep freeze for so long that it's going to feel tropical, no matter what!
http://www.weather.com/weather/monthly/USFL0372?month=1