Yes, in Orlando it does sometimes get cooler than on the coasts (we're on
the east coast in Port St. Lucie). A couple of things you can do:

If you have well water available, turn on a well-fed sprinkler(s) before the
temps are due to go down. The water from the well is about 70 degrees, and
will help. Someone suggested installing outdoor type Christmas lights as
well. Then there are propane heaters of the kind they use when building
structures in cold weather. They come in many sizes, and I'm pretty sure
can be found at HD or Lowe's. Air circulation is important in order to
avoid spotting and tissue damage in cold weather.

And I'd invest a couple of bucks in a remote temperature alarm. We have one
made by Oregon Scientific, which I'm sure you can find online. It was
something like sixty or seventy dollars, and included several remotes in
addition to the main unit. It sounds like a big deal, but the main unit is
only about 5" square and can mount on a wall or sit on a surface.

Hope this helps.

Diana