ST. LUCIE COUNTY, Fla. - Ranchers are keeping one eye on the mercury and the other on their herds.
The Adams Ranch west of Fort Pierce is one of the largest cattle ranches in the country.
President Mike Adams says the cattle are very hearty and can withstand colder temperatures.
He says they plan ahead for the winter by letting the pasture grass grow in the summer.
The concern is if there's a lot of frost on the ground that would kill the grasses the cattle feed on.
"We haven't had any frost until the middle of January and that's very unusual for us. We're really happy with the way this winter is going," Adams said.
Adams says the large number of tree hammocks on the ranch help because they can prevent frost from forming underneath.