KathyH, welcome to the DIS!
It's true that the average temperature for early Feb is in the low 70s, but that doesn't mean you will get weather like that. Winters in Orlando are very unpredictable. You could have days in the 80s with cool mornings, or you could have mornings near freezing with afternoon highs stuck in the 40s. Unfortunately you could have both of those scenarios in the ten days you are there, so you should pack everything you own!
Bob