Data: 2023 USDA zones (PRISM/OSU) · NOAA 1991–2020 normals · updated Oct 29, 2026

Planting zone for 12762 — Mongaup Valley, NY

ZIP code 12762 (Mongaup Valley, Sullivan County) is in USDA zone 6a: the coldest winter night averages −10 to −5 °F. The median last spring frost is May 9 and the first fall frost October 5.

Where ZIP 12762 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.

Zone6a−10 to −5 °F

Coldest night−23.3 to −20.6 °C

Last frostMay 9

First frostOct 5

2012 zone5b

Was 5b 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 6a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Mongaup Valley, 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 Mongaup Valley, NY

JanFebMarAprMayJunJulAugSepOctNovDec

Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free

Last spring frostMay 9median — 50% chance of a later frost

Safe for tender plantsMay 23only 10% chance of frost after

First fall frostOctober 5median — 10% chance by Sep 24

Growing season149 daysfrost-free, median

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

From the NOAA station Liberty 1 Ne, NY — 10 miles away, elevation 1,581 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 12762

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Mar 28 – Apr 11

SpinachSow outdoors · Mar 28 – Apr 18

Broccoli, cabbageStart indoors · Feb 28 – Mar 14

Broccoli, cabbageTransplant · Apr 18 – May 2

Onion setsPlant outdoors · Apr 11 – Apr 25

PotatoesPlant outdoors · Apr 18 – May 2

LettuceSow outdoors · Apr 11 – Apr 25

Carrots, beetsSow outdoors · Apr 18 – May 2

TomatoesStart indoors · Mar 14 – Mar 28

TomatoesTransplant · May 16 – May 30

Peppers, eggplantStart indoors · Feb 28 – Mar 14

Peppers, eggplantTransplant · May 23 – Jun 6

BeansSow outdoors · May 16 – May 30

Sweet cornSow outdoors · May 16 – May 30

Cucumbers, squashSow outdoors · May 16 – May 30

Fall lettuce, spinachSow outdoors · Aug 10 – Aug 24

GarlicPlant cloves · Sep 21 – Oct 26

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 9) and first fall frost (Oct 5) 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 12762 came on Apr 5 — 8 days earlier than the 1991–2020 average (Apr 13).

average
Apr 132026
Apr 5

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 Mongaup Valley, NY

The soil mapped at the center of ZIP 12762 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-Oquaga 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 12762; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Mongaup Valley, NY

Summer high79 °Faverage high, July

Winter low13 °Faverage low, January

Hot days4days a year at 90 °F or more

Freezing nights163nights a year at 32 °F or less

Growing degree days2,033base 50 °F — the season’s usable heat

Longest day15 h 12 mindaylight on June 21

Shortest day9 h 09 mindaylight on December 21

Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)

Precipitation53.1 inper year, rain and melted snow

Snowfall70 inper year; 87 days with snow on the ground

Average high and low, by month

Precipitation by month inches · ❄ = snowfall

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Liberty 1 Ne, NY (10 mi away); precipitation: Liberty 1 Ne, NY (10 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 6a.

127786a

Smallwood, NY · 1 mi

127496a

Kauneonga Lake, NY · 3 mi

127866a

White Lake, NY · 4 mi

127016a

Monticello, NY · 5 mi

New York planting zones →

Questions about 12762

What planting zone is ZIP code 12762?

ZIP code 12762 (Mongaup Valley, NY) is in USDA hardiness zone 6a on the 2023 map: the coldest night of an average winter reaches −10 to −5 °F (−23.3 to −20.6 °C).

When is the last frost in Mongaup Valley, NY?

The median last spring frost (32 °F) near 12762 is May 9; after May 23 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Liberty 1 Ne station.

When is the first frost in Mongaup Valley, NY?

The median first fall frost near 12762 is October 5, giving a median frost-free growing season of 149 days.

When should I plant tomatoes in 12762?

Start tomato seeds indoors around Mar 14 – Mar 28 and set transplants outside around May 16 – May 30, one to three weeks after the median last frost.

How much rain and snow does 12762 get?

About 53.1 inches of precipitation a year and 70 inches of snowfall (NOAA 1991–2020 normals, Liberty 1 Ne station).

How hot do summers get in Mongaup Valley, NY?

The average high peaks at 79 °F in July, with about 4 days a year at 90 °F or more.

What kind of soil does 12762 have?

The USDA soil survey maps Arnot at the center of ZIP 12762: moderately decomposed plant material, somewhat excessively drained, pH about 4.8 (strongly acidic).

Did spring come early in Mongaup Valley, NY in 2026?

Spring leaf-out near 12762 came on Apr 5 in 2026, 8 days earlier than the 1991–2020 average (Apr 13), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Mongaup Valley, NY?

Long-day onions: the longest day near 12762 is 15 h 12 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 12762 change?

Yes. The 2012 USDA map put 12762 in zone 5b; the 2023 map puts it in zone 6a. The newer map uses 1991–2020 data and more weather stations.