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

Planting zone for 13421 — Oneida, NY

ZIP code 13421 (Oneida, Madison County) is in USDA zone 5b: the coldest winter night averages −15 to −10 °F. The median last spring frost is May 1 and the first fall frost October 13.

Where ZIP 13421 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 1

First frostOct 13

2012 zone5b

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 5b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Oneida, 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 Oneida, NY

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostMay 1median — 50% chance of a later frost

Safe for tender plantsMay 17only 10% chance of frost after

First fall frostOctober 13median — 10% chance by Sep 29

Growing season164 daysfrost-free, median

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

From the NOAA station Utica Oneida Co. Airport, NY — 15 miles away, elevation 712 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 13421

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Mar 20 – Apr 3

SpinachSow outdoors · Mar 20 – Apr 10

Broccoli, cabbageStart indoors · Feb 20 – Mar 6

Broccoli, cabbageTransplant · Apr 10 – Apr 24

Onion setsPlant outdoors · Apr 3 – Apr 17

PotatoesPlant outdoors · Apr 10 – Apr 24

LettuceSow outdoors · Apr 3 – Apr 17

Carrots, beetsSow outdoors · Apr 10 – Apr 24

TomatoesStart indoors · Mar 6 – Mar 20

TomatoesTransplant · May 8 – May 22

Peppers, eggplantStart indoors · Feb 20 – Mar 6

Peppers, eggplantTransplant · May 15 – May 29

BeansSow outdoors · May 8 – May 22

Sweet cornSow outdoors · May 8 – May 22

Cucumbers, squashSow outdoors · May 8 – May 22

Fall lettuce, spinachSow outdoors · Aug 18 – Sep 1

GarlicPlant cloves · Sep 29 – Nov 3

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 1) and first fall frost (Oct 13) 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 13421 came on Apr 10 — 6 days earlier than the 1991–2020 average (Apr 16).

average
Apr 162026
Apr 10

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 Oneida, NY.

Soil in Oneida, NY

The soil mapped at the center of ZIP 13421 is Lairdsville — silty clay loam, well drained.

TextureSilty clay loamholds water and nutrients; slow to drain and warm up

pH6.5neutral; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter4.5%moderate

Hydrologic groupDwater soaks in very slowly

Farmland classNot prime farmlandUSDA classification

Map unit: Lairdsville silty clay loam, 25 to 40 percent slopes, severely eroded.

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 13421; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Oneida, NY

Summer high81 °Faverage high, July

Winter low14 °Faverage low, January

Hot days5days a year at 90 °F or more

Freezing nights140nights a year at 32 °F or less

Growing degree days2,414base 50 °F — the season’s usable heat

Longest day15 h 22 mindaylight on June 21

Shortest day9 h 00 mindaylight on December 21

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

Precipitation46.1 inper year, rain and melted snow

Average high and low, by month

Precipitation by month inches

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Utica Oneida Co. Airport, NY (15 mi away); precipitation: Oneida 0.4 Nw, NY (within 1 mile). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 5b.

134615b

Sherrill, NY · 3 mi

130435b

Clockville, NY · 4 mi

Munnsville, NY · 7 mi

134785b

Verona, NY · 7 mi

130545b

Durhamville, NY · 7 mi

134775b

Vernon Center, NY · 8 mi

New York planting zones →

Questions about 13421

What planting zone is ZIP code 13421?

ZIP code 13421 (Oneida, 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 Oneida, NY?

The median last spring frost (32 °F) near 13421 is May 1; after May 17 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Utica Oneida Co. Airport station.

When is the first frost in Oneida, NY?

The median first fall frost near 13421 is October 13, giving a median frost-free growing season of 164 days.

When should I plant tomatoes in 13421?

Start tomato seeds indoors around Mar 6 – Mar 20 and set transplants outside around May 8 – May 22, one to three weeks after the median last frost.

How much rain and snow does 13421 get?

About 46.1 inches of precipitation a year (NOAA 1991–2020 normals, Oneida 0.4 Nw station).

How hot do summers get in Oneida, NY?

The average high peaks at 81 °F in July, with about 5 days a year at 90 °F or more.

What kind of soil does 13421 have?

The USDA soil survey maps Lairdsville at the center of ZIP 13421: silty clay loam, well drained, pH about 6.5 (neutral).

Did spring come early in Oneida, NY in 2026?

Spring leaf-out near 13421 came on Apr 10 in 2026, 6 days earlier than the 1991–2020 average (Apr 16), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Oneida, NY?

Long-day onions: the longest day near 13421 is 15 h 22 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).