What Hardiness Zone Is New Jersey?

USDA 2023 Plant Hardiness Zone Map · 715 ZIP codes · Data updated 2026-10-28

Quick answer

New Jersey spans USDA hardiness zones 6b–8a on the 2023 Plant Hardiness Zone Map. The most common zone is 7a, covering 47% of New Jersey's ZIP codes, followed by zone 7b (40%). Zone 7a means the coldest night of an average winter reaches 0°F to 5°F (−18°C to −15°C). Enter your ZIP code for your exact zone.

New Jersey hardiness zones by share of ZIP codes

Zone 6b11% · 76 ZIPs

Zone 7a47% · 339 ZIPs

Zone 7b40% · 289 ZIPs

Zone 8a2% · 11 ZIPs

What the zones mean for New Jersey gardeners

Coldest and warmest towns: among towns with NOAA weather stations, Sussex 8 NNW (1,020 ft) is in zone 6b, while Atlantic City (10 ft) is in zone 8a. That is a difference of about 15°F in the coldest night of a typical winter.
Same zone, different frost dates: within zone 7a, the median last spring frost ranges from April 11 at Cranford to April 30 at Somerville 4 NW, 19 days apart. Your zone tells you which perennials survive winter; your frost dates tell you when to plant.

Typical frost dates in each New Jersey zone

Medians across NOAA weather stations in each zone. Colder zones usually have later spring frosts, but local terrain can shift the dates by weeks.

Zone	Last spring frost	First fall frost	Stations
6b	April 25	October 17	6
7a	April 18	October 23	25
7b	April 10	November 1	15

Hardiness zones for New Jersey cities

Zones at the National Weather Service stations, mostly city airports, with their median frost dates.


Andover Aeroflex Airport	6b	−5°F to 0°F	583	Apr 25	Oct 19
Atlantic City	8a	10°F to 15°F	10	Mar 26	Nov 21
Atlantic City Intl Airport	7a	0°F to 5°F	60	Apr 18	Oct 29
Caldwell Essex County Airport	7a	0°F to 5°F	173	Apr 14	Oct 28
Millville Municipal Airport	7a	0°F to 5°F	70	Apr 24	Oct 23
Mount Holly S Jersey Airport	7b	5°F to 10°F	53	Apr 15	Oct 28
Newark Intl Airport	7b	5°F to 10°F	7	Apr 2	Nov 10
Somerville Somerset Airport	7a	0°F to 5°F	105	Apr 26	Oct 18
Sussex Airport	6b	−5°F to 0°F	421	May 1	Oct 12
Teterboro Airport	7b	5°F to 10°F	9	Apr 3	Nov 4
Trenton Mercer County Airport	7b	5°F to 10°F	184	Apr 10	Nov 1

Hardiness zones for 48 towns in New Jersey

Each NOAA weather station is shown with the USDA zone of the nearest ZIP code (within 8 miles). Coldest night is the zone's range for the average annual extreme minimum temperature. Click a column to sort.

Filter by town


Andover Aeroflex Airport	6b	−5°F to 0°F	583	Apr 25	Oct 19
Atlantic City	8a	10°F to 15°F	10	Mar 26	Nov 21
Atlantic City Intl Airport	7a	0°F to 5°F	60	Apr 18	Oct 29
Belleplain Station Forest	7a	0°F to 5°F	30	Apr 24	Oct 22
Belvidere Brg	7a	0°F to 5°F	263	Apr 30	Oct 18
Boonton 1 SE	7a	0°F to 5°F	280	Apr 17	Oct 23
Brant Beach-beach Haven	7b	5°F to 10°F	5	Apr 1	Nov 15
Caldwell Essex County Airport	7a	0°F to 5°F	173	Apr 14	Oct 28
Canoe Brook	7a	0°F to 5°F	180	Apr 18	Oct 27
Cape May 2 NW	8a	10°F to 15°F	20	Apr 1	Nov 9
Charlotteburg Rsvr	6b	−5°F to 0°F	778	Apr 25	Oct 17
Cranford	7a	0°F to 5°F	80	Apr 11	Oct 31
Essex Fells Service Bldg	7a	0°F to 5°F	350	Apr 18	Oct 24
Estell Manor	7a	0°F to 5°F	85	Apr 24	Oct 22
Flemington 5 NNW	7a	0°F to 5°F	265	Apr 24	Oct 21
Freehold-marlboro	7a	0°F to 5°F	194	Apr 17	Oct 23
Glassboro 2 NE	7b	5°F to 10°F	100	Apr 8	Nov 1
Hammonton 1 NE	7a	0°F to 5°F	125	Apr 14	Oct 27
Harrison	7b	5°F to 10°F	24	Apr 4	Nov 6
Hightstown 2 W	7a	0°F to 5°F	100	Apr 25	Oct 16
Indian Mills 2 W	7a	0°F to 5°F	100	Apr 28	Oct 15
Lambertville	7a	0°F to 5°F	68	Apr 16	Oct 19
Little Falls	7a	0°F to 5°F	150	Apr 15	Oct 28
Long Branch-oakhurst	7b	5°F to 10°F	30	Apr 9	Nov 3
Margate	7b	5°F to 10°F	16	Mar 26	Nov 22
Millville Municipal Airport	7a	0°F to 5°F	70	Apr 24	Oct 23
Moorestown	7b	5°F to 10°F	45	Apr 12	Nov 1
Mount Holly S Jersey Airport	7b	5°F to 10°F	53	Apr 15	Oct 28
New Brunswick 3 SE	7a	0°F to 5°F	111	Apr 15	Oct 26
Newark Intl Airport	7b	5°F to 10°F	7	Apr 2	Nov 10
Newton	6b	−5°F to 0°F	605	Apr 24	Oct 16
Pennsauken 1N	7b	5°F to 10°F	46	Apr 15	Oct 31
Philadelphia/mt Holly WFO	7b	5°F to 10°F	63	Apr 15	Oct 29
Phillipsburg-easton Brg	7a	0°F to 5°F	232	Apr 18	Oct 25
Plainfield	7a	0°F to 5°F	90	Apr 11	Oct 28
Seabrook Farms	7b	5°F to 10°F	104	Apr 10	Nov 1
Somerville 4 NW	7a	0°F to 5°F	134	Apr 30	Oct 20
Somerville Somerset Airport	7a	0°F to 5°F	105	Apr 26	Oct 18
Sussex 3 WNW	6b	−5°F to 0°F	667	Apr 30	Oct 11
Sussex 8 NNW	6b	−5°F to 0°F	1,020	Apr 20	Oct 20
Sussex Airport	6b	−5°F to 0°F	421	May 1	Oct 12
Teterboro Airport	7b	5°F to 10°F	9	Apr 3	Nov 4
Toms River	7a	0°F to 5°F	10	Apr 23	Oct 20
Trenton Mercer County Airport	7b	5°F to 10°F	184	Apr 10	Nov 1
Trenton State College	7b	5°F to 10°F	100	Apr 17	Oct 28
Wanaque Raymond Dam	7a	0°F to 5°F	245	Apr 19	Oct 23
Wertsville 4 NE	7a	0°F to 5°F	283	Apr 16	Oct 27
Woodstown Pittsgrov 4E	7b	5°F to 10°F	98	Apr 11	Nov 3

Frequently asked questions

What hardiness zone is New Jersey?

New Jersey is in USDA hardiness zones 6b–8a on the 2023 USDA Plant Hardiness Zone Map. Zone 7a is the most common, covering 47% of New Jersey's ZIP codes, and zone 7b covers 40%. Enter your ZIP code for your exact zone.

What does zone 7a mean?

Zone 7a means the average annual extreme minimum temperature, the coldest night of a typical winter, is 0°F to 5°F (−18°C to −15°C). Perennials, shrubs and trees rated for zone 7a or colder should survive winter there.

What is the coldest hardiness zone in New Jersey?

Zone 6b is the coldest zone mapped in New Jersey, found around Sussex 8 NNW, and zone 8a is the warmest, found around Atlantic City.

Did New Jersey's hardiness zones change in 2023?

The USDA released a new Plant Hardiness Zone Map in November 2023, based on 1991–2020 temperatures instead of 1976–2005. About half of the United States shifted half a zone warmer. Check your ZIP code here, because plant tags and older books may still list your 2012 zone.

When should I plant in zone 7a?

Hardiness zones don't set planting dates; frost dates do. Inside zone 7a in New Jersey, the median last spring frost varies from April 11 to April 30. Look up your local frost dates and plant tender crops such as tomatoes after the 10%-risk last-frost date.

Zone and frost dates: use both

Your hardiness zone answers one question: will this plant survive the winter here? Choose perennials, shrubs, trees and bulbs rated for your zone or a colder one. For vegetables and annuals, what matters is the length of the frost-free season. See New Jersey frost dates by town, or get a planting calendar for your ZIP code with start-indoors, transplant and sowing dates for 30 crops.

Sources and method

Zones are from the USDA 2023 Plant Hardiness Zone Map ZIP-code files published by the PRISM Climate Group, Oregon State University, based on 1991–2020 minimum temperatures. ZIP codes are assigned to states by USPS prefix. Town zones use the ZIP code nearest each NOAA 1991–2020 Climate Normals station. This is an independent tool, not an official USDA site. Full methodology.