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

Planting zone for 07640 — Harrington Park, NJ

ZIP code 07640 (Harrington Park, Bergen County) is in USDA zone 7a: the coldest winter night averages 0 to 5 °F. The median last spring frost is April 20 and the first fall frost October 26.

Where ZIP 07640 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 20
First frostOct 26
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 Harrington Park, 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 Harrington Park, NJ

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 20median — 50% chance of a later frost
Safe for tender plantsMay 6only 10% chance of frost after
First fall frostOctober 26median — 10% chance by Oct 10
Growing season189 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 4 and returns around November 7.

From the NOAA station Dobbs Ferry-Ardsley, NY — 7 miles away, elevation 200 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 07640

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 9 – Mar 23
SpinachSow outdoors · Mar 9 – Mar 30
Broccoli, cabbageStart indoors · Feb 9 – Feb 23
Broccoli, cabbageTransplant · Mar 30 – Apr 13
Onion setsPlant outdoors · Mar 23 – Apr 6
PotatoesPlant outdoors · Mar 30 – Apr 13
LettuceSow outdoors · Mar 23 – Apr 6
Carrots, beetsSow outdoors · Mar 30 – Apr 13
TomatoesStart indoors · Feb 23 – Mar 9
TomatoesTransplant · Apr 27 – May 11
Peppers, eggplantStart indoors · Feb 9 – Feb 23
Peppers, eggplantTransplant · May 4 – May 18
BeansSow outdoors · Apr 27 – May 11
Sweet cornSow outdoors · Apr 27 – May 11
Cucumbers, squashSow outdoors · Apr 27 – May 11
Fall lettuce, spinachSow outdoors · Aug 31 – Sep 14
GarlicPlant cloves · Oct 12 – Nov 16
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 20) and first fall frost (Oct 26) 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 07640 came on Mar 27 — about the same time as the 1991–2020 average (Mar 26).

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 Harrington Park, NJ

The soil mapped at the center of ZIP 07640 is Udorthents — sand, moderately well drained.

TextureSanddrains and warms fast; dries out and needs more feeding
pH5.0strongly acidic; most vegetables like 6.0–7.0
DrainageModerately well drainednatural drainage class
Organic matter1.75%low — add compost
Hydrologic groupDwater soaks in very slowly
Farmland classNot prime farmlandUSDA classification

Map unit: Udorthents, wet substratum-Urban land complex.

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 07640; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Harrington Park, NJ

Summer high86 °Faverage high, July
Winter low23 °Faverage low, January
Hot days19days a year at 90 °F or more
Freezing nights109nights a year at 32 °F or less
Growing degree days3,333base 50 °F — the season’s usable heat
Longest day15 h 08 mindaylight on June 21
Shortest day9 h 13 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation47.1 inper year, rain and melted snow

Average high and low, by month

10°20°30°40°50°60°70°80°90°100°32 °FJanuary: average high 40 °F, low 23 °F 40°23° JanFebruary: average high 43 °F, low 25 °F 43°25° FebMarch: average high 51 °F, low 31 °F 51°31° MarApril: average high 63 °F, low 40 °F 63°40° AprMay: average high 73 °F, low 50 °F 73°50° MayJune: average high 81 °F, low 59 °F 81°59° JunJuly: average high 86 °F, low 64 °F 86°64° JulAugust: average high 84 °F, low 63 °F 84°63° AugSeptember: average high 77 °F, low 56 °F 77°56° SepOctober: average high 65 °F, low 45 °F 65°45° OctNovember: average high 54 °F, low 36 °F 54°36° NovDecember: average high 45 °F, low 29 °F 45°29° Dec

Precipitation by month inches

0″1″2″3″4″5″January: 3.35 in precipitation 3.4 JanFebruary: 3.02 in precipitation 3.0 FebMarch: 4.09 in precipitation 4.1 MarApril: 3.86 in precipitation 3.9 AprMay: 3.56 in precipitation 3.6 MayJune: 4.07 in precipitation 4.1 JunJuly: 4.49 in precipitation 4.5 JulAugust: 4.53 in precipitation 4.5 AugSeptember: 4.53 in precipitation 4.5 SepOctober: 4.07 in precipitation 4.1 OctNovember: 3.51 in precipitation 3.5 NovDecember: 4.03 in precipitation 4.0 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Dobbs Ferry-Ardsley, NY (7 mi away); precipitation: New Milford, NJ (3 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

076757a
Westwood, NJ · 1 mi
076487a
Norwood, NJ · 2 mi
076247a
Closter, NJ · 2 mi
076417a
Haworth, NJ · 2 mi
076477a
Northvale, NJ · 2 mi
076307a
Emerson, NJ · 3 mi
076277b
Demarest, NJ · 3 mi
109837a
Tappan, NY · 3 mi

New Jersey planting zones →

Questions about 07640

What planting zone is ZIP code 07640?

ZIP code 07640 (Harrington Park, 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 Harrington Park, NJ?

The median last spring frost (32 °F) near 07640 is April 20; after May 6 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Dobbs Ferry-Ardsley station.

When is the first frost in Harrington Park, NJ?

The median first fall frost near 07640 is October 26, giving a median frost-free growing season of 189 days.

When should I plant tomatoes in 07640?

Start tomato seeds indoors around Feb 23 – Mar 9 and set transplants outside around Apr 27 – May 11, one to three weeks after the median last frost.

How much rain and snow does 07640 get?

About 47.1 inches of precipitation a year (NOAA 1991–2020 normals, New Milford station).

How hot do summers get in Harrington Park, NJ?

The average high peaks at 86 °F in July, with about 19 days a year at 90 °F or more.

What kind of soil does 07640 have?

The USDA soil survey maps Udorthents at the center of ZIP 07640: sand, moderately well drained, pH about 5.0 (strongly acidic).

Did spring come early in Harrington Park, NJ in 2026?

Spring leaf-out near 07640 came on Mar 27 in 2026, about the same as the 1991–2020 average (Mar 26), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Harrington Park, NJ?

Long-day onions: the longest day near 07640 is 15 h 08 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).