Weather in Florida
Florida weather is seldom extremely cold although there have been cases of frost in the winter, not good for the orange groves. I have been at Christmas and it was sunny and warm enough for shorts and t-shirts although the locals were seen at Disney in Puffa jackets, hats and gloves ! It can be chilly at night between November and March in the north and coastal areas but daytime winter temperatures are normally around 70 degrees F / 20 degrees C.
Summertime temperatures average in the 80s and higher inland. Expect a brief thunderstorm most afternoons in the summer - quite refreshing and cools everything down for a brief period. Some attractions close in the case of severe thunderstorms.
Also be aware of Hurricanes between June and November - if you are advised to stayed in doors or leave the area then please do, it could save your life.