Nobody will be able to tell you this with any accuracy. Everybody can tell you what it was when they were there, but that means nothing. It could be below 30 degrees or above 90 degrees. Sorry, I’m not trying to be mean or snoty. I’ve lived in Florida for 32 years and my best advice is check the forecast before you go and plan on layers of clothing.
I totally agree as we have stayed into the first week of Jan during our Christmas stays (11 years in a row and counting) and theres been years on the cooler side. OP you stated have locker plus goes summer months so I would think
you have summer clothes and should put in your backpack more of sweatshirts/jackets. In past years my wife wore her winter coat while we walked thru Disney Springs in the evening. Then there were years we are sweating and swimming
in the pool. Still beats NY tristate area during the winter months.