Isn't that just the way it is. I remember calling home to Boston on my first Christmas in South Florida and bragging about being on the beach all day. 70 and beautiful, swimming all day. Three years later, same weather and sitting around in a sweater wondering when it was going to warm up.
Daytona wasn't the spring break Capitol of the world for so many years because it was cold (and that was in March). Go enjoy, if you run into cold weather, take in an attraction.