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

Planting zone for 10451 — Bronx, NY

ZIP code 10451 (Bronx, Bronx County) is in USDA zone 7b: the coldest winter night averages 5 to 10 °F. The median last spring frost is March 26 and the first fall frost November 25.

Where ZIP 10451 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.

Zone7b5 to 10 °F
Coldest night−15 to −12.2 °C
Last frostMar 26
First frostNov 25
2012 zone7b

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 7b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Bronx, NY…

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 Bronx, NY

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMarch 26median — 50% chance of a later frost
Safe for tender plantsApril 6only 10% chance of frost after
First fall frostNovember 25median — 10% chance by Nov 10
Growing season244 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 15 and returns around December 5.

From the NOAA station New York Laguardia Airport, NY — 4 miles away, elevation 10 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 10451

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Feb 12 – Feb 26
SpinachSow outdoors · Feb 12 – Mar 5
Broccoli, cabbageStart indoors · Jan 15 – Jan 29
Broccoli, cabbageTransplant · Mar 5 – Mar 19
Onion setsPlant outdoors · Feb 26 – Mar 12
PotatoesPlant outdoors · Mar 5 – Mar 19
LettuceSow outdoors · Feb 26 – Mar 12
Carrots, beetsSow outdoors · Mar 5 – Mar 19
TomatoesStart indoors · Jan 29 – Feb 12
TomatoesTransplant · Apr 2 – Apr 16
Peppers, eggplantStart indoors · Jan 15 – Jan 29
Peppers, eggplantTransplant · Apr 9 – Apr 23
BeansSow outdoors · Apr 2 – Apr 16
Sweet cornSow outdoors · Apr 2 – Apr 16
Cucumbers, squashSow outdoors · Apr 2 – Apr 16
Fall lettuce, spinachSow outdoors · Sep 30 – Oct 14
GarlicPlant cloves · Nov 11 – Dec 16
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Mar 26) and first fall frost (Nov 25) 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 10451 came on Mar 23 — 3 days later than the 1991–2020 average (Mar 20).

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 Bronx, NY

The soil mapped at the center of ZIP 10451 is Riverhead — loamy coarse sand, well drained.

TextureLoamy coarse sanddrains and warms fast; dries out and needs more feeding
pH6.6neutral; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter4%moderate
Hydrologic groupAwater soaks in fast
Farmland classNot prime farmlandUSDA classification

Map unit: Riverhead-Flatbush complex, 3 to 8 percent slopes.

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 10451; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Bronx, NY

Summer high86 °Faverage high, July
Winter low29 °Faverage low, January
Hot days22days a year at 90 °F or more
Freezing nights62nights a year at 32 °F or less
Growing degree days4,121base 50 °F — the season’s usable heat
Longest day15 h 06 mindaylight on June 21
Shortest day9 h 14 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation45.3 inper year, rain and melted snow
Snowfall30 inper year; 21 days with snow on the ground

Average high and low, by month

20°30°40°50°60°70°80°90°100°32 °FJanuary: average high 40 °F, low 29 °F 40°29° JanFebruary: average high 43 °F, low 30 °F 43°30° FebMarch: average high 50 °F, low 36 °F 50°36° MarApril: average high 61 °F, low 46 °F 61°46° AprMay: average high 72 °F, low 56 °F 72°56° MayJune: average high 81 °F, low 66 °F 81°66° JunJuly: average high 86 °F, low 72 °F 86°72° JulAugust: average high 85 °F, low 71 °F 85°71° AugSeptember: average high 77 °F, low 64 °F 77°64° SepOctober: average high 66 °F, low 53 °F 66°53° OctNovember: average high 55 °F, low 43 °F 55°43° NovDecember: average high 45 °F, low 35 °F 45°35° Dec

Precipitation by month inches · ❄ = snowfall

0″1″2″3″4″5″January: 3.25 in precipitation, 8.6 in snowfall 3.3❄9 JanFebruary: 2.93 in precipitation, 9.8 in snowfall 2.9❄10 FebMarch: 4.01 in precipitation, 5.4 in snowfall 4.0❄5 MarApril: 3.85 in precipitation, 0.4 in snowfall 3.9 AprMay: 3.58 in precipitation 3.6 MayJune: 4.03 in precipitation 4.0 JunJuly: 4.30 in precipitation 4.3 JulAugust: 4.41 in precipitation 4.4 AugSeptember: 3.88 in precipitation 3.9 SepOctober: 3.81 in precipitation, 0.1 in snowfall 3.8 OctNovember: 3.15 in precipitation, 0.3 in snowfall 3.1 NovDecember: 4.08 in precipitation, 5.2 in snowfall 4.1❄5 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: New York Laguardia Airport, NY (4 mi away); precipitation: New York Laguardia Airport, NY (4 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 7b.

104557b
Bronx, NY · <1 mi
104567b
Bronx, NY · <1 mi
104527b
Bronx, NY · 1 mi
100307b
New York, NY · 1 mi
104547b
Bronx, NY · 1 mi
100317b
New York, NY · 1 mi
104597b
Bronx, NY · 2 mi
100327b
New York, NY · 2 mi

All 25 ZIP codes in Bronx → · New York planting zones →

Questions about 10451

What planting zone is ZIP code 10451?

ZIP code 10451 (Bronx, NY) is in USDA hardiness zone 7b on the 2023 map: the coldest night of an average winter reaches 5 to 10 °F (−15 to −12.2 °C).

When is the last frost in Bronx, NY?

The median last spring frost (32 °F) near 10451 is March 26; after April 6 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, New York Laguardia Airport station.

When is the first frost in Bronx, NY?

The median first fall frost near 10451 is November 25, giving a median frost-free growing season of 244 days.

When should I plant tomatoes in 10451?

Start tomato seeds indoors around Jan 29 – Feb 12 and set transplants outside around Apr 2 – Apr 16, one to three weeks after the median last frost.

How much rain and snow does 10451 get?

About 45.3 inches of precipitation a year and 30 inches of snowfall (NOAA 1991–2020 normals, New York Laguardia Airport station).

How hot do summers get in Bronx, NY?

The average high peaks at 86 °F in July, with about 22 days a year at 90 °F or more.

What kind of soil does 10451 have?

The USDA soil survey maps Riverhead at the center of ZIP 10451: loamy coarse sand, well drained, pH about 6.6 (neutral).

Did spring come early in Bronx, NY in 2026?

Spring leaf-out near 10451 came on Mar 23 in 2026, 3 days later than the 1991–2020 average (Mar 20), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Bronx, NY?

Long-day onions: the longest day near 10451 is 15 h 06 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).