A freeze warning was issued for most of Southeastern PA, along with some areas in North Jersey by the National Weather Service.
A frost advisory was issued for the remaining areas of New Jersey.
During the day, temps will be in the 50s with chance of showers in the afternoon.
Come nightfall, temperatures are expected to drop to the high 20s in some northern parts of New Jersey.
The Lehigh Valley, Philadelphia area and the remainder of New Jersey will likely see temps in the 30s.
The warnings and advisories are in place until 9 a.m. Wednesday.
Click here to follow Daily Voice Washington Township and receive free news updates.