38F in the early morning hours here.
No blooms yet so I guess thats good
Do you have your own thermometer or you just looked at your iphone? I'm in Weston and the lowest I saw in my own thermometer this morning was 42°F at around 7:00AM. So, the 39°F that the Weather Channel was predicting was off by 3°F or perhaps the canal next to my house helped a little bit. By 8:00AM the thermometer was at 45°F and by 9:00AM it was at 47°F.
Actually, Coral Springs can be a degree or two cooler than Weston - interesting 
Unless you spent a pretty penny, most thermometers have a +/- error range of like 5 degrees. I'd trust (most) weather device stations much more. Go on wunderground and locate all the devices nearest your home and check those against your thermometer.
Ok, this is what was recorded for my city, so it looks like my thermometer was pretty close. The same was recorded for Coral Springs.
7:53 AM, Thu 4 January 2018 43° 27° 53% 30.16in 10mi Unl NNW 10mph NA Clear
6:53 AM, Thu 4 January 2018
41° 28° 60% 30.13in 10mi Unl NNW 7mph NA Clear
5:53 AM, Thu 4 January 2018 42° 28° 58% 30.1in 10mi Unl NW 7mph NA Clear
4:53 AM, Thu 4 January 2018 43° 32° 65% 30.09in 10mi Unl NNW 14mph NA Few Clouds