The National Weather Service may issue frost warnings tonight for areas north of Sumter.
"Right now, we are a little bit concerned we may have some patchy frost," said Doug Anderson, meteorologist with the National Weather Service in Columbia.
The coldest temperatures will be tonight into Saturday morning.
"We are currently forecasting temperatures around 34 degrees for Sumter proper," Anderson said. "I have no doubt low-lying areas will be 32 or slightly colder."
After a high of only 54 today, the high on Saturday will be about 64, according to NWS forecasts.
Anderson said one of the factors limiting the chance of frost tonight and Saturday morning is the dewpoint, or the amount of moisture in the air.
"We'll have significant dry air working in during the day today, which may limit the extent of frost formation," he explained.
For Saturday and Sunday nights, the chances of frost will likely decrease, he said. Sunday is expected to be mostly cloudy with a high of 58.
"One of the complicating factors we are looking at is another frontal system dropping in late Sunday that might bring up enough moisture and cloud things up a little bit and hold (the frost) off," he said.
Anderson said Saturday night and Sunday, cloud cover will increase, putting morning lows at about 35 with less of a chance of frost.
He said a frontal boundary Sunday night won't tap a lot of moisture but that there is still a 30 percent chance of precipitation.
"After that, the weather looks great with temperatures up in the 40s in the mornings," he said.
High temperatures Monday and Tuesday should be in the low to mid-60s.