The average temperature in Florida depends on where you are in the state. The northern part of Florida, including Tallahassee, has a winter high of 62 degrees and a low of 38 degrees. In the summer Tallahassee averages 91 with a low of 81. The more tropical southern region, including Miami, has an average winter high of 75 degrees and a low of 58. The nice ocean breezes keep the summer high in Miami at 88 and lows at 76.