Data: 2023 USDA zones (PRISM/OSU) · NOAA 1991–2020 normals · updated

Planting zone for 08240 — Pomona, NJ

ZIP code 08240 (Pomona, Atlantic County) is in USDA zone 7a: the coldest winter night averages 0 to 5 °F. The median last spring frost is April 18 and the first fall frost October 29.

Where ZIP 08240 is

Outlined: the ZIP code area · tap the map for the zone at any spot · scroll or pinch to zoom

Not the official USDA Plant Hardiness Zone Map. Zones come from the 2023 USDA hardiness-zone data by the PRISM Group, Oregon State University; we re-mapped and recolored them. The official map is at planthardiness.ars.usda.gov.

Zone7a0 to 5 °F
Coldest night−17.8 to −15 °C
Last frostApr 18
First frostOct 29
2012 zone7a

Same zone as on the 2012 map. The zone is the one at the center of the ZIP code; hilly ZIPs can span two zones. What zone 7a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Pomona, NJ…

Forecast data: National Weather Service (api.weather.gov), public domain. This is not a warning service — for official frost and freeze warnings see weather.gov.

Frost dates in Pomona, NJ

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 18median — 50% chance of a later frost
Safe for tender plantsMay 5only 10% chance of frost after
First fall frostOctober 29median — 10% chance by Oct 13
Growing season190 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 5 and returns around November 8.

From the NOAA station Atlantic City Intl Airport, NJ — 3 miles away, elevation 59 ft. NOAA NCEI U.S. Climate Normals 1991–2020, 32 °F threshold. Low spots and valleys can freeze later in spring than the station.

When to plant vegetables in 08240

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 7 – Mar 21
SpinachSow outdoors · Mar 7 – Mar 28
Broccoli, cabbageStart indoors · Feb 7 – Feb 21
Broccoli, cabbageTransplant · Mar 28 – Apr 11
Onion setsPlant outdoors · Mar 21 – Apr 4
PotatoesPlant outdoors · Mar 28 – Apr 11
LettuceSow outdoors · Mar 21 – Apr 4
Carrots, beetsSow outdoors · Mar 28 – Apr 11
TomatoesStart indoors · Feb 21 – Mar 7
TomatoesTransplant · Apr 25 – May 9
Peppers, eggplantStart indoors · Feb 7 – Feb 21
Peppers, eggplantTransplant · May 2 – May 16
BeansSow outdoors · Apr 25 – May 9
Sweet cornSow outdoors · Apr 25 – May 9
Cucumbers, squashSow outdoors · Apr 25 – May 9
Fall lettuce, spinachSow outdoors · Sep 3 – Sep 17
GarlicPlant cloves · Oct 15 – Nov 19
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 18) and first fall frost (Oct 29) with the rules of thumb U.S. extension services publish. Cool-season crops take a light frost; warm-season crops do best once the soil is above about 60 °F.

When spring arrived in 2026

In 2026, spring leaf-out near 08240 came on Mar 18 — about the same time as the 1991–2020 average (Mar 19).

JanFebMarAprMayJun

The Spring Index marks the day when accumulated warmth is enough for lilac and honeysuckle to leaf out — a widely used signal that the growing season has started. Source: USA National Phenology Network, www.usanpn.org — Spring Indices, first leaf, 2026 (data as of 2026-09-08) and 30-year average 1991–2020 (CC BY 4.0).

Soil in Pomona, NJ

The soil mapped at the center of ZIP 08240 is Berryland — sand, very poorly drained.

TextureSanddrains and warms fast; dries out and needs more feeding
pH4.3strongly acidic; most vegetables like 6.0–7.0
DrainageVery poorly drainedconsider raised beds
Organic matter3%moderate
Hydrologic groupA/Ddrains fast once dried out; wet otherwise
Farmland classFarmland of unique importanceUSDA classification

Map unit: Berryland sand, 0 to 2 percent slopes, rarely flooded.

Soil Survey Staff, Natural Resources Conservation Service, USDA. Soil Survey Geographic (SSURGO) Database, via Soil Data Access, accessed 2026-10-29. The soil at the center point of ZIP 08240; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Pomona, NJ

Summer high87 °Faverage high, July
Winter low25 °Faverage low, January
Hot days23days a year at 90 °F or more
Freezing nights101nights a year at 32 °F or less
Growing degree days3,695base 50 °F — the season’s usable heat
Longest day14 h 58 mindaylight on June 21
Shortest day9 h 23 mindaylight on December 21
Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully
Precipitation46 inper year, rain and melted snow
Snowfall17 inper year; 10 days with snow on the ground

Average high and low, by month

10°20°30°40°50°60°70°80°90°100°32 °FJanuary: average high 43 °F, low 25 °F 43°25° JanFebruary: average high 46 °F, low 26 °F 46°26° FebMarch: average high 53 °F, low 33 °F 53°33° MarApril: average high 63 °F, low 42 °F 63°42° AprMay: average high 73 °F, low 51 °F 73°51° MayJune: average high 82 °F, low 61 °F 82°61° JunJuly: average high 87 °F, low 67 °F 87°67° JulAugust: average high 85 °F, low 65 °F 85°65° AugSeptember: average high 79 °F, low 58 °F 79°58° SepOctober: average high 68 °F, low 46 °F 68°46° OctNovember: average high 57 °F, low 37 °F 57°37° NovDecember: average high 48 °F, low 29 °F 48°29° Dec

Precipitation by month inches · ❄ = snowfall

0″1″2″3″4″5″January: 3.38 in precipitation, 5.7 in snowfall 3.4❄6 JanFebruary: 3.23 in precipitation, 5.9 in snowfall 3.2❄6 FebMarch: 4.52 in precipitation, 2.2 in snowfall 4.5❄2 MarApril: 3.32 in precipitation, 0.3 in snowfall 3.3 AprMay: 3.34 in precipitation 3.3 MayJune: 3.58 in precipitation 3.6 JunJuly: 4.47 in precipitation 4.5 JulAugust: 4.59 in precipitation 4.6 AugSeptember: 3.55 in precipitation 3.5 SepOctober: 4.14 in precipitation 4.1 OctNovember: 3.37 in precipitation, 0.1 in snowfall 3.4 NovDecember: 4.47 in precipitation, 3.2 in snowfall 4.5❄3 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Atlantic City Intl Airport, NJ (3 mi away); precipitation: Atlantic City Intl Airport, NJ (3 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

6 of the 8 nearest ZIP codes are in a different zone — elevation and distance from water change winter lows quickly.

082317b
Oceanville, NJ · 4 mi
082137a
Cologne, NJ · 4 mi
082057b
Absecon, NJ · 4 mi
082417b
Port Republic, NJ · 4 mi
082017b
Absecon, NJ · 5 mi
082207b
Leeds Point, NJ · 6 mi
082327b
Pleasantville, NJ · 7 mi
082157a
Egg Harbor City, NJ · 7 mi

New Jersey planting zones →

Questions about 08240

What planting zone is ZIP code 08240?

ZIP code 08240 (Pomona, NJ) is in USDA hardiness zone 7a on the 2023 map: the coldest night of an average winter reaches 0 to 5 °F (−17.8 to −15 °C).

When is the last frost in Pomona, NJ?

The median last spring frost (32 °F) near 08240 is April 18; after May 5 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Atlantic City Intl Airport station.

When is the first frost in Pomona, NJ?

The median first fall frost near 08240 is October 29, giving a median frost-free growing season of 190 days.

When should I plant tomatoes in 08240?

Start tomato seeds indoors around Feb 21 – Mar 7 and set transplants outside around Apr 25 – May 9, one to three weeks after the median last frost.

How much rain and snow does 08240 get?

About 46 inches of precipitation a year and 17 inches of snowfall (NOAA 1991–2020 normals, Atlantic City Intl Airport station).

How hot do summers get in Pomona, NJ?

The average high peaks at 87 °F in July, with about 23 days a year at 90 °F or more.

What kind of soil does 08240 have?

The USDA soil survey maps Berryland at the center of ZIP 08240: sand, very poorly drained, pH about 4.3 (strongly acidic).

Did spring come early in Pomona, NJ in 2026?

Spring leaf-out near 08240 came on Mar 18 in 2026, about the same as the 1991–2020 average (Mar 19), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Pomona, NJ?

Intermediate onions: the longest day near 08240 is 14 h 58 min, so day-neutral types bulb best; long-day varieties may not bulb fully.