Its still getting up to the 80's durning the day and dropping down to the 60's at night. To me thats still shorts weather with a lightweight pullover in the evening.
You're going to need a bit of everything I'm afraid. I live in Orlando and right now it's 82 degrees outside with full bright sunshine...definitely shorts and tanks/t's. However with no notice at all it drops down to the high 60's during the day too. Sometimes nights are warm, other times, they're cold. It will be like this now until March.
For the last 2 weeks I have been wearing a combo of shorts, T's and jeans. And most definitely bring a sweatshirt and/or sweater to wear out at night. I'm not being an overly cautious Floridian, I just moved here from freezing cold upstate NY!