Still a few hours left, but looks like the cold was sorely over-estimated by NWS in Florida. Georgia and South Carolina seem to have done well. Here's how lows are faring as of the 4:53 AM EST METAR observations.
Punta Gorda, FL - 32
Tampa, FL - 36
Orlando, FL - 34
Miami, FL - 44
Jacksonville, FL - 25
A bit farther north:
Atlanta, GA - 23
Charleston, SC - 23
Florence, SC - 18