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

Planting zone for 13849 — Unadilla, NY

ZIP code 13849 (Unadilla, Otsego County) is in USDA zone 5b: the coldest winter night averages −15 to −10 °F. The median last spring frost is May 11 and the first fall frost October 9.

Where ZIP 13849 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.

Zone5b−15 to −10 °F

Coldest night−26.1 to −23.3 °C

Last frostMay 11

First frostOct 9

2012 zone5a

Was 5a 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 5b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Unadilla, 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 Unadilla, NY

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostMay 11median — 50% chance of a later frost

Safe for tender plantsMay 26only 10% chance of frost after

First fall frostOctober 9median — 10% chance by Sep 27

Growing season151 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 30 and returns around October 23.

From the NOAA station E Sidney, NY — 5 miles away, elevation 1,155 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 13849

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Mar 30 – Apr 13

SpinachSow outdoors · Mar 30 – Apr 20

Broccoli, cabbageStart indoors · Mar 2 – Mar 16

Broccoli, cabbageTransplant · Apr 20 – May 4

Onion setsPlant outdoors · Apr 13 – Apr 27

PotatoesPlant outdoors · Apr 20 – May 4

LettuceSow outdoors · Apr 13 – Apr 27

Carrots, beetsSow outdoors · Apr 20 – May 4

TomatoesStart indoors · Mar 16 – Mar 30

TomatoesTransplant · May 18 – Jun 1

Peppers, eggplantStart indoors · Mar 2 – Mar 16

Peppers, eggplantTransplant · May 25 – Jun 8

BeansSow outdoors · May 18 – Jun 1

Sweet cornSow outdoors · May 18 – Jun 1

Cucumbers, squashSow outdoors · May 18 – Jun 1

Fall lettuce, spinachSow outdoors · Aug 14 – Aug 28

GarlicPlant cloves · Sep 25 – Oct 30

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 11) and first fall frost (Oct 9) 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 13849 came on Apr 8 — 8 days earlier than the 1991–2020 average (Apr 16).

average
Apr 162026
Apr 8

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 5b in New York

609 plants native to the lower 48 states, recorded in New York, and rated by the USDA to survive −15 °F or colder — the bottom of zone 5b. 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 Unadilla, NY.

Soil in Unadilla, NY

The soil mapped at the center of ZIP 13849 is Lordstown — channery silt loam, well drained.

TextureChannery silt loama good balance for most vegetables

pH5.5moderately acidic; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter5%high

Hydrologic groupCwater soaks in slowly

Farmland classprime farmlandUSDA classification

Map unit: Lordstown-Arnot complex, 1 to 8 percent slopes, 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 13849; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Unadilla, NY

Summer high82 °Faverage high, July

Winter low11 °Faverage low, January

Hot days6days a year at 90 °F or more

Freezing nights162nights a year at 32 °F or less

Growing degree days2,242base 50 °F — the season’s usable heat

Longest day15 h 17 mindaylight on June 21

Shortest day9 h 04 mindaylight on December 21

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

Precipitation44.4 inper year, rain and melted snow

Snowfall79 inper year; 88 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: E Sidney, NY (5 mi away); precipitation: Unadilla 2 N, NY (within 1 mile). Daylight is calculated from latitude.

Nearby ZIP codes

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

138595b

Wells Bridge, NY · 4 mi

138385b

Sidney, NY · 5 mi

138095b

Mount Upton, NY · 6 mi

138395a

Sidney Center, NY · 8 mi

137335b

Bainbridge, NY · 9 mi

138045b

Masonville, NY · 9 mi

138255b

Otego, NY · 9 mi

137765b

Gilbertsville, NY · 9 mi

New York planting zones →

Questions about 13849

What planting zone is ZIP code 13849?

ZIP code 13849 (Unadilla, NY) is in USDA hardiness zone 5b on the 2023 map: the coldest night of an average winter reaches −15 to −10 °F (−26.1 to −23.3 °C).

When is the last frost in Unadilla, NY?

The median last spring frost (32 °F) near 13849 is May 11; after May 26 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, E Sidney station.

When is the first frost in Unadilla, NY?

The median first fall frost near 13849 is October 9, giving a median frost-free growing season of 151 days.

When should I plant tomatoes in 13849?

Start tomato seeds indoors around Mar 16 – Mar 30 and set transplants outside around May 18 – Jun 1, one to three weeks after the median last frost.

How much rain and snow does 13849 get?

About 44.4 inches of precipitation a year and 79 inches of snowfall (NOAA 1991–2020 normals, Unadilla 2 N station).

How hot do summers get in Unadilla, NY?

The average high peaks at 82 °F in July, with about 6 days a year at 90 °F or more.

What kind of soil does 13849 have?

The USDA soil survey maps Lordstown at the center of ZIP 13849: channery silt loam, well drained, pH about 5.5 (moderately acidic).

Did spring come early in Unadilla, NY in 2026?

Spring leaf-out near 13849 came on Apr 8 in 2026, 8 days earlier than the 1991–2020 average (Apr 16), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Unadilla, NY?

Long-day onions: the longest day near 13849 is 15 h 17 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 13849 change?

Yes. The 2012 USDA map put 13849 in zone 5a; the 2023 map puts it in zone 5b. The newer map uses 1991–2020 data and more weather stations.