I saw it 17 degrees out here in Orlando in 1984. that was the 'year the fruit crops froze and the growers lost a lot of crops. Some didn't have the money to replant the trees so we have a lot of vacant fields here now.
I am from Ohio so I know how cold it can get there. I moved here in 1980 for warm weather. hahaha Normally, it stays around 65 to 70 degrees in the winter time in Orlando. But, we do get cold spells. the nice things is they don't last to long here.