There is a freeze warning in NJ issued by the Philadelphia - PA, US, National Weather Service.
The areas affected by this freeze warning are portions of central, northern, and southern Delaware, northeast Maryland, central, northern, and southern New Jersey, and southeast Pennsylvania.
Description
...FREEZE WARNING REMAINS IN EFFECT FROM 2 AM TO 9 AM EDT MONDAY...
WHAT...Sub-freezing temperatures as low as 30 expected.
WHERE...Portions of central, northern, and southern Delaware, northeast Maryland, central, northern, and southern New Jersey, and southeast Pennsylvania.
WHEN...From 2 AM to 9 AM EDT Monday.
IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Take steps now to protect tender plants from the cold.