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

Planting zone for 11765 — Mill Neck, NY

ZIP code 11765 (Mill Neck, Nassau County) is in USDA zone 7b: the coldest winter night averages 5 to 10 °F. The median last spring frost is April 9 and the first fall frost November 10.

Where ZIP 11765 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 frostApr 9
First frostNov 10
2012 zone7a

Was 7a on the 2012 map — half a zone warmer now. 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 Mill Neck, 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 Mill Neck, NY

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 9median — 50% chance of a later frost
Safe for tender plantsApril 23only 10% chance of frost after
First fall frostNovember 10median — 10% chance by Oct 30
Growing season215 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 30 and returns around November 21.

From the NOAA station Centerport, NY — 10 miles away, elevation 30 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 11765

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Feb 26 – Mar 12
SpinachSow outdoors · Feb 26 – Mar 19
Broccoli, cabbageStart indoors · Jan 29 – Feb 12
Broccoli, cabbageTransplant · Mar 19 – Apr 2
Onion setsPlant outdoors · Mar 12 – Mar 26
PotatoesPlant outdoors · Mar 19 – Apr 2
LettuceSow outdoors · Mar 12 – Mar 26
Carrots, beetsSow outdoors · Mar 19 – Apr 2
TomatoesStart indoors · Feb 12 – Feb 26
TomatoesTransplant · Apr 16 – Apr 30
Peppers, eggplantStart indoors · Jan 29 – Feb 12
Peppers, eggplantTransplant · Apr 23 – May 7
BeansSow outdoors · Apr 16 – Apr 30
Sweet cornSow outdoors · Apr 16 – Apr 30
Cucumbers, squashSow outdoors · Apr 16 – Apr 30
Fall lettuce, spinachSow outdoors · Sep 15 – Sep 29
GarlicPlant cloves · Oct 27 – Dec 1
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 9) and first fall frost (Nov 10) 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 11765 came on Apr 1 — 5 days later than the 1991–2020 average (Mar 27).

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 Mill Neck, NY

The soil mapped at the center of ZIP 11765 is Riverhead — slightly decomposed plant material, well drained.

TextureSlightly decomposed plant materialtop layer
pH4.5strongly acidic; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter90%high
Hydrologic groupAwater soaks in fast
Farmland classNot prime farmlandUSDA classification

Map unit: Riverhead sandy loam, 15 to 25 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 11765; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Mill Neck, NY

Summer high83 °Faverage high, July
Winter low25 °Faverage low, January
Hot days11days a year at 90 °F or more
Freezing nights88nights a year at 32 °F or less
Growing degree days3,244base 50 °F — the season’s usable heat
Longest day15 h 07 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)
Precipitation47.7 inper year, rain and melted snow

Average high and low, by month

10°20°30°40°50°60°70°80°90°32 °FJanuary: average high 38 °F, low 25 °F 38°25° JanFebruary: average high 40 °F, low 25 °F 40°25° FebMarch: average high 47 °F, low 31 °F 47°31° MarApril: average high 60 °F, low 41 °F 60°41° AprMay: average high 70 °F, low 51 °F 70°51° MayJune: average high 78 °F, low 60 °F 78°60° JunJuly: average high 83 °F, low 66 °F 83°66° JulAugust: average high 81 °F, low 65 °F 81°65° AugSeptember: average high 74 °F, low 59 °F 74°59° SepOctober: average high 63 °F, low 49 °F 63°49° OctNovember: average high 52 °F, low 39 °F 52°39° NovDecember: average high 43 °F, low 31 °F 43°31° Dec

Precipitation by month inches

0″1″2″3″4″5″January: 3.84 in precipitation 3.8 JanFebruary: 3.18 in precipitation 3.2 FebMarch: 4.37 in precipitation 4.4 MarApril: 4.42 in precipitation 4.4 AprMay: 3.90 in precipitation 3.9 MayJune: 3.71 in precipitation 3.7 JunJuly: 3.90 in precipitation 3.9 JulAugust: 4.06 in precipitation 4.1 AugSeptember: 4.12 in precipitation 4.1 SepOctober: 4.24 in precipitation 4.2 OctNovember: 3.66 in precipitation 3.7 NovDecember: 4.33 in precipitation 4.3 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Centerport, NY (10 mi away); precipitation: Syosset, NY (6 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 7b.

115607b
Locust Valley, NY · 2 mi
117097b
Bayville, NY · 2 mi
117717b
Oyster Bay, NY · 2 mi
117327b
East Norwich, NY · 3 mi
115427b
Glen Cove, NY · 4 mi
115457b
Glen Head, NY · 4 mi
117917b
Syosset, NY · 5 mi
117737b
Syosset, NY · 5 mi

New York planting zones →

Questions about 11765

What planting zone is ZIP code 11765?

ZIP code 11765 (Mill Neck, 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 Mill Neck, NY?

The median last spring frost (32 °F) near 11765 is April 9; after April 23 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Centerport station.

When is the first frost in Mill Neck, NY?

The median first fall frost near 11765 is November 10, giving a median frost-free growing season of 215 days.

When should I plant tomatoes in 11765?

Start tomato seeds indoors around Feb 12 – Feb 26 and set transplants outside around Apr 16 – Apr 30, one to three weeks after the median last frost.

How much rain and snow does 11765 get?

About 47.7 inches of precipitation a year (NOAA 1991–2020 normals, Syosset station).

How hot do summers get in Mill Neck, NY?

The average high peaks at 83 °F in July, with about 11 days a year at 90 °F or more.

What kind of soil does 11765 have?

The USDA soil survey maps Riverhead at the center of ZIP 11765: slightly decomposed plant material, well drained, pH about 4.5 (strongly acidic).

Did spring come early in Mill Neck, NY in 2026?

Spring leaf-out near 11765 came on Apr 1 in 2026, 5 days later than the 1991–2020 average (Mar 27), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Mill Neck, NY?

Long-day onions: the longest day near 11765 is 15 h 07 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 11765 change?

Yes. The 2012 USDA map put 11765 in zone 7a; the 2023 map puts it in zone 7b. The newer map uses 1991–2020 data and more weather stations.