We got married at home, but also had to do it in August, for similar reasons. I'm still in graduate school, so we chose early August to give me time to get married, do a nice honeymoon (Disneymoon) and have a little time to recuperate before starting back. It also gave me the summer before in order to do all the last minute work since I only had a two week class and that was it all summer.
It was HOT, but it was ok because we did everything inside. At that time of year rain is such a huge risk too that I would probably plan to be inside. In the afternoons in FL about 3pm everyday there's a storm...short, but if your wedding was near that time it *could* be problematic.
Crowds were still a little heavy for us since we were early in the month, but it was mostly REALLY good.