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

Planting zone for 12785 — Westbrookville, NY

ZIP code 12785 (Westbrookville, Sullivan County) is in USDA zone 6b: the coldest winter night averages −5 to 0 °F. The median last spring frost is May 7 and the first fall frost October 7.

Where ZIP 12785 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.

Zone6b−5 to 0 °F
Coldest night−20.6 to −17.8 °C
Last frostMay 7
First frostOct 7
2012 zone6a

Was 6a 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 6b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Westbrookville, 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 Westbrookville, NY

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMay 7median — 50% chance of a later frost
Safe for tender plantsMay 22only 10% chance of frost after
First fall frostOctober 7median — 10% chance by Sep 25
Growing season152 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 27 and returns around October 20.

From the NOAA station Rock Hill 3 Sw, NY — 3 miles away, elevation 1,270 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 12785

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 26 – Apr 9
SpinachSow outdoors · Mar 26 – Apr 16
Broccoli, cabbageStart indoors · Feb 26 – Mar 12
Broccoli, cabbageTransplant · Apr 16 – Apr 30
Onion setsPlant outdoors · Apr 9 – Apr 23
PotatoesPlant outdoors · Apr 16 – Apr 30
LettuceSow outdoors · Apr 9 – Apr 23
Carrots, beetsSow outdoors · Apr 16 – Apr 30
TomatoesStart indoors · Mar 12 – Mar 26
TomatoesTransplant · May 14 – May 28
Peppers, eggplantStart indoors · Feb 26 – Mar 12
Peppers, eggplantTransplant · May 21 – Jun 4
BeansSow outdoors · May 14 – May 28
Sweet cornSow outdoors · May 14 – May 28
Cucumbers, squashSow outdoors · May 14 – May 28
Fall lettuce, spinachSow outdoors · Aug 12 – Aug 26
GarlicPlant cloves · Sep 23 – Oct 28
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 7) and first fall frost (Oct 7) 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 12785 came on Apr 3 — 9 days earlier than the 1991–2020 average (Apr 12).

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).

Native plants for zone 6b in New York

641 plants native to the lower 48 states, recorded in New York, and rated by the USDA to survive −5 °F or colder — the bottom of zone 6b. Each links to its USDA PLANTS profile.

Trees 77

American basswood100 ft · blooms late spring · low shade tolerance · to −46 °FAmerican beech80 ft · blooms mid spring · low shade tolerance · to −44 °FAmerican chestnut115 ft · blooms early summer · high shade tolerance · to −33 °FAmerican elm120 ft · blooms early spring · medium shade tolerance · to −46 °FAmerican sycamore100 ft · blooms spring · medium shade tolerance · to −34 °Farborvitae50 ft · blooms mid spring · medium shade tolerance · to −33 °F

Shrubs 130

alderleaf buckthorn3 ft · blooms late spring · low shade tolerance · to −33 °FAllegheny serviceberry35 ft · blooms early spring · low shade tolerance · to −38 °Falternateleaf dogwood25 ft · blooms mid spring · low shade tolerance · to −47 °FAmerican black currant3 ft · blooms early spring · to −46 °FAmerican hazelnut10 ft · blooms spring · medium shade tolerance · to −33 °FAmerican holly40 ft · blooms mid spring · low shade tolerance · to −20 °F

Wildflowers & perennials 217

alkali buttercup1 ft · blooms late spring · low shade tolerance · to −38 °FAmerican bur-reed3 ft · blooms indeterminate · medium shade tolerance · to −33 °FAmerican eelgrass1 ft · blooms mid summer · high shade tolerance · to −33 °FAmerican licorice4 ft · blooms late spring · medium shade tolerance · to −38 °FAmerican lotus3 ft · blooms mid summer · high shade tolerance · to −36 °FAmerican pokeweed7 ft · blooms mid summer · low shade tolerance · to −33 °F

Grasses 192

alkali sacaton3 ft · blooms mid summer · high shade tolerance · to −38 °FAmerican beachgrass2.5 ft · blooms spring · high shade tolerance · to −28 °Farctic brome3 ft · blooms early summer · low shade tolerance · to −33 °FAtlantic mannagrass3 ft · blooms summer · low shade tolerance · to −8 °Fawlfruit sedge4 ft · blooms mid spring · low shade tolerance · to −38 °FBailey's sedge2.1 ft · blooms late spring · low shade tolerance · to −33 °F

Vines 8

American bittersweet15 ft · blooms spring · low shade tolerance · to −38 °Fdevil's darning needles15 ft · blooms mid summer · medium shade tolerance · to −38 °Ffrost grape83 ft · blooms late spring · medium shade tolerance · to −23 °Friverbank grape45 ft · blooms late spring · medium shade tolerance · to −33 °Fsummer grape30 ft · blooms late spring · low shade tolerance · to −23 °Ftrumpet creeper2 ft · blooms summer · high shade tolerance · to −13 °F

Source: USDA, NRCS. 2026. The PLANTS Database (plants.usda.gov), National Plant Data Team — state distribution, native status and the “Temperature, Minimum” characteristic. Check light, moisture and soil needs before buying; local nurseries and your state native plant society can confirm what thrives in Westbrookville, NY.

Soil in Westbrookville, NY

The soil mapped at the center of ZIP 12785 is Arnot — moderately decomposed plant material, somewhat excessively drained.

TextureModerately decomposed plant materialtop layer
pH4.8strongly acidic; most vegetables like 6.0–7.0
DrainageSomewhat excessively drainednatural drainage class
Organic matter80%high
Hydrologic groupDwater soaks in very slowly
Farmland classNot prime farmlandUSDA classification

Map unit: Arnot-Lordstown complex, 15 to 35 percent slopes, very rocky.

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 12785; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Westbrookville, NY

Summer high80 °Faverage high, July
Winter low12 °Faverage low, February
Hot days2days a year at 90 °F or more
Freezing nights160nights a year at 32 °F or less
Growing degree days2,154base 50 °F — the season’s usable heat
Longest day15 h 11 mindaylight on June 21
Shortest day9 h 10 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation51.9 inper year, rain and melted snow
Snowfall58 inper year; 84 days with snow on the ground

Average high and low, by month

0°10°20°30°40°50°60°70°80°90°32 °FJanuary: average high 32 °F, low 14 °F 32°14° JanFebruary: average high 35 °F, low 12 °F 35°12° FebMarch: average high 44 °F, low 20 °F 44°20° MarApril: average high 56 °F, low 32 °F 56°32° AprMay: average high 67 °F, low 44 °F 67°44° MayJune: average high 75 °F, low 53 °F 75°53° JunJuly: average high 80 °F, low 58 °F 80°58° JulAugust: average high 78 °F, low 56 °F 78°56° AugSeptember: average high 71 °F, low 48 °F 71°48° SepOctober: average high 59 °F, low 37 °F 59°37° OctNovember: average high 47 °F, low 28 °F 47°28° NovDecember: average high 36 °F, low 20 °F 36°20° Dec

Precipitation by month inches · ❄ = snowfall

0″1″2″3″4″5″6″January: 3.73 in precipitation, 16.5 in snowfall 3.7❄17 JanFebruary: 3.14 in precipitation, 10.8 in snowfall 3.1❄11 FebMarch: 4.10 in precipitation, 12.9 in snowfall 4.1❄13 MarApril: 4.02 in precipitation, 2 in snowfall 4.0❄2 AprMay: 4.18 in precipitation 4.2 MayJune: 5.01 in precipitation 5.0 JunJuly: 4.76 in precipitation 4.8 JulAugust: 4.73 in precipitation 4.7 AugSeptember: 4.76 in precipitation 4.8 SepOctober: 5.06 in precipitation, 0.7 in snowfall 5.1❄1 OctNovember: 3.78 in precipitation, 2 in snowfall 3.8❄2 NovDecember: 4.63 in precipitation, 13 in snowfall 4.6❄13 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Rock Hill 3 Sw, NY (3 mi away); precipitation: Rock Hill 3 Sw, NY (3 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

127906b
Wurtsboro, NY · 3 mi
127296b
Cuddebackville, NY · 4 mi
127756a
Rock Hill, NY · 5 mi
109636b
Otisville, NY · 6 mi
127776a
Forestburgh, NY · 6 mi
127816b
Summitville, NY · 7 mi
109326b
Howells, NY · 8 mi
127386a
Glen Wild, NY · 8 mi

New York planting zones →

Questions about 12785

What planting zone is ZIP code 12785?

ZIP code 12785 (Westbrookville, NY) is in USDA hardiness zone 6b on the 2023 map: the coldest night of an average winter reaches −5 to 0 °F (−20.6 to −17.8 °C).

When is the last frost in Westbrookville, NY?

The median last spring frost (32 °F) near 12785 is May 7; after May 22 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Rock Hill 3 Sw station.

When is the first frost in Westbrookville, NY?

The median first fall frost near 12785 is October 7, giving a median frost-free growing season of 152 days.

When should I plant tomatoes in 12785?

Start tomato seeds indoors around Mar 12 – Mar 26 and set transplants outside around May 14 – May 28, one to three weeks after the median last frost.

How much rain and snow does 12785 get?

About 51.9 inches of precipitation a year and 58 inches of snowfall (NOAA 1991–2020 normals, Rock Hill 3 Sw station).

How hot do summers get in Westbrookville, NY?

The average high peaks at 80 °F in July, with about 2 days a year at 90 °F or more.

What kind of soil does 12785 have?

The USDA soil survey maps Arnot at the center of ZIP 12785: moderately decomposed plant material, somewhat excessively drained, pH about 4.8 (strongly acidic).

Did spring come early in Westbrookville, NY in 2026?

Spring leaf-out near 12785 came on Apr 3 in 2026, 9 days earlier than the 1991–2020 average (Apr 12), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Westbrookville, NY?

Long-day onions: the longest day near 12785 is 15 h 11 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 12785 change?

Yes. The 2012 USDA map put 12785 in zone 6a; the 2023 map puts it in zone 6b. The newer map uses 1991–2020 data and more weather stations.