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

Planting zone for 13782 — Hamden, NY

ZIP code 13782 (Hamden, Delaware County) is in USDA zone 5a: the coldest winter night averages −20 to −15 °F. The median last spring frost is May 15 and the first fall frost October 3.

Where ZIP 13782 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.

Zone5a−20 to −15 °F

Coldest night−28.9 to −26.1 °C

Last frostMay 15

First frostOct 3

2012 zone5a

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 5a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Hamden, 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 Hamden, NY

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostMay 15median — 50% chance of a later frost

Safe for tender plantsMay 30only 10% chance of frost after

First fall frostOctober 3median — 10% chance by Sep 21

Growing season140 daysfrost-free, median

A hard freeze (28 °F) usually ends around May 3 and returns around October 13.

From the NOAA station Downsville Dam, NY — 6 miles away, elevation 1,201 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 13782

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Apr 3 – Apr 17

SpinachSow outdoors · Apr 3 – Apr 24

Broccoli, cabbageStart indoors · Mar 6 – Mar 20

Broccoli, cabbageTransplant · Apr 24 – May 8

Onion setsPlant outdoors · Apr 17 – May 1

PotatoesPlant outdoors · Apr 24 – May 8

LettuceSow outdoors · Apr 17 – May 1

Carrots, beetsSow outdoors · Apr 24 – May 8

TomatoesStart indoors · Mar 20 – Apr 3

TomatoesTransplant · May 22 – Jun 5

Peppers, eggplantStart indoors · Mar 6 – Mar 20

Peppers, eggplantTransplant · May 29 – Jun 12

BeansSow outdoors · May 22 – Jun 5

Sweet cornSow outdoors · May 22 – Jun 5

Cucumbers, squashSow outdoors · May 22 – Jun 5

Fall lettuce, spinachSow outdoors · Aug 8 – Aug 22

GarlicPlant cloves · Sep 19 – Oct 24

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 15) and first fall frost (Oct 3) 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 13782 came on Apr 12 — 7 days earlier than the 1991–2020 average (Apr 19).

average
Apr 192026
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 5a in New York

584 plants native to the lower 48 states, recorded in New York, and rated by the USDA to survive −20 °F or colder — the bottom of zone 5a. Each links to its USDA PLANTS profile.

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 Hamden, NY.

Soil in Hamden, NY

The soil mapped at the center of ZIP 13782 is Lackawanna — flaggy silt loam, well drained.

TextureFlaggy silt loama good balance for most vegetables

pH5.3strongly acidic; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter5%high

Hydrologic groupCwater soaks in slowly

Farmland classFarmland of statewide importanceUSDA classification

Map unit: Lackawanna flaggy silt loam, 8 to 15 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 13782; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Hamden, NY

Summer high81 °Faverage high, July

Winter low12 °Faverage low, January

Hot days3days a year at 90 °F or more

Freezing nights170nights a year at 32 °F or less

Growing degree days2,216base 50 °F — the season’s usable heat

Longest day15 h 16 mindaylight on June 21

Shortest day9 h 06 mindaylight on December 21

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

Precipitation48.6 inper year, rain and melted snow

Snowfall71 inper year

Average high and low, by month

Precipitation by month inches · ❄ = snowfall

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Downsville Dam, NY (6 mi away); precipitation: Delhi 2 Se, NY (7 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.

137525a

Delancey, NY · 5 mi

137555b

Downsville, NY · 7 mi

East Branch, NY · 13 mi

137755b

Franklin, NY · 13 mi

138465a

Treadwell, NY · 14 mi

New York planting zones →

Questions about 13782

What planting zone is ZIP code 13782?

ZIP code 13782 (Hamden, NY) is in USDA hardiness zone 5a on the 2023 map: the coldest night of an average winter reaches −20 to −15 °F (−28.9 to −26.1 °C).

When is the last frost in Hamden, NY?

The median last spring frost (32 °F) near 13782 is May 15; after May 30 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Downsville Dam station.

When is the first frost in Hamden, NY?

The median first fall frost near 13782 is October 3, giving a median frost-free growing season of 140 days.

When should I plant tomatoes in 13782?

Start tomato seeds indoors around Mar 20 – Apr 3 and set transplants outside around May 22 – Jun 5, one to three weeks after the median last frost.

How much rain and snow does 13782 get?

About 48.6 inches of precipitation a year and 71 inches of snowfall (NOAA 1991–2020 normals, Delhi 2 Se station).

How hot do summers get in Hamden, NY?

The average high peaks at 81 °F in July, with about 3 days a year at 90 °F or more.

What kind of soil does 13782 have?

The USDA soil survey maps Lackawanna at the center of ZIP 13782: flaggy silt loam, well drained, pH about 5.3 (strongly acidic).

Did spring come early in Hamden, NY in 2026?

Spring leaf-out near 13782 came on Apr 12 in 2026, 7 days earlier than the 1991–2020 average (Apr 19), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Hamden, NY?

Long-day onions: the longest day near 13782 is 15 h 16 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).