The National Weather Service has issued a frost advisory for Northampton and Lehigh counties that will be in effect from 4 to 8 a.m. Monday morning.
In a statement, the weather service said low temperatures will be around 35 degrees “with some locally colder spots possible.”
The coldest temperatures are expected during the few hours before sunrise, when sensitive plants could be damaged by the unusually cold air if not protected or brought inside.
Monday is forecast to be sunny and breezy with a high around 64 degrees.