What part of Florida? Not speaking as a traveller here, just as a Floridian over on the Gulf coast.
Agree with the stethoscope thing. Doesn't hurt to have an extra.
Sunglasses. No, really! The sun is brutal on your eyes down here. Also, don't even think about being anywhere without air conditioning and/or a water source.
The water in Florida sucks. Plan on buying bottled drinking water, and plan on enough to make your morning coffee, or be prepared for a very negative early-morning experience. There are a few different brands of water, some with more minerals or less, depending on your preference. I like Zephyrhills, myself. Aquafina has more minerals (ugh).
Bring loose, casual, comfortable clothing for outside of work. If you need to go to a very dressy function, just buy something here. We have some great sales. But in most cases, jeans and a T-shirt are the answer. Oh, and do bring a sweater. It can get chilly at night. If you want to scope out what we actually wear everyday, this store is pretty much on-target with the style of the natives.
Last but not least, remembering that Florida is the lightning capital of the nation, take thunderstorms very
seriously. Do not stay in the water at the hint of a storm, etc. I used to respect lightning till I moved here. Now, seeing some of the weird things it's done, I'm way more careful.
It might be a nice idea to invest in One Tank Trips
, by Bill Murphy. Because life is not all work, and because Florida does have so many excellent things to do on your day off.
Best wishes for a great assignment!