Frost Advisories are in effect from 1 a.m. to 9 a.m. EDT Monday for 28 counties across New Jersey, Delaware, Maryland and Virginia.
Temperatures as low as 33 degrees will result in frost formation.
NWS Mount Holly and NWS Baltimore-Washington issued the advisories Sunday afternoon.
Sensitive outdoor plants may be killed if left uncovered.
New Jersey, Delaware and Maryland’s Eastern Shore
NWS Mount Holly: 1 a.m. to 9 a.m. EDT Monday, with lows as cold as 35 degrees.
New Jersey (4): Salem, Gloucester, Camden and Cumberland.
Delaware (3): New Castle, Kent and Inland Sussex.
Maryland (3): Kent, Queen Anne’s and Caroline.
Cities include Wilmington, Dover, Cherry Hill, Camden, Millville, Glassboro, Pennsville, Georgetown, Denton and Chestertown.
Maryland and Virginia
NWS Baltimore-Washington: 1 a.m. to 9 a.m. EDT Monday, with lows as cold as 33 degrees.
The coldest temperatures are expected in valleys and other low-lying locations.
Maryland (6): Carroll, Northern Baltimore, Cecil, Montgomery, Howard and Harford.
Virginia (12 counties and 2 cities): Albemarle, Greene, Madison, Rappahannock, Orange, Culpeper, Fairfax, Stafford, Spotsylvania, Fauquier, Eastern Loudoun and Prince William, plus Manassas and Manassas Park.
Cities and communities include Rockville, Bel Air, Columbia, Silver Spring, Gaithersburg, Reston, Leesburg, Fredericksburg, Culpeper, Charlottesville, Warrenton and Dulles Airport.
Source: NWS Baltimore-Washington on X
Growing Season Ending
NWS Baltimore-Washington says the growing season has ended in Frederick County, Maryland, and western Loudoun County, Virginia, and in areas west of the Blue Ridge.
No frost or freeze alerts will be issued there until spring 2027.
What Comes Next
High pressure shifts south Monday, with warmer highs near 70 degrees early in the week.
A dry cold front crosses the area Tuesday.
NWS Mount Holly expects sunny and dry weather through the week, with temperatures moderating.
How to Protect Plants
Take steps now to protect tender plants from the cold.
Cover sensitive plants before sunset, and bring potted plants indoors if you can.
Local forecasts and alerts: NWS Mount Holly and NWS Baltimore-Washington.
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