Trampslady, Florida weather this time of year is very much like the weather here (I'm also in the DFW area). It could be in the 70's one day and then a cold front comes in and drops the temps 30 degrees. We've had to buy warm clothes at WDW in March because we were so cold. So it's very hard to predict. It's a good idea to take a sweatshirt or jacket with you just in case. I can tell you though, that our experience from Dallas is that WDW will practically mirror the weather here one week before and then it's usually slightly warmer, maybe 10 degrees, in FL. So if there is a cool front dropping the temps here, 1 week before your trip, you can expect a similar temp drop in FL.