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

Planting zone for 13103 — Mallory, NY

ZIP code 13103 (Mallory, Oswego County) is in USDA zone 5b: the coldest winter night averages −15 to −10 °F. The median last spring frost is May 4 and the first fall frost October 11.

Where ZIP 13103 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 4

First frostOct 11

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 Mallory, 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 Mallory, NY

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostMay 4median — 50% chance of a later frost

Safe for tender plantsMay 19only 10% chance of frost after

First fall frostOctober 11median — 10% chance by Sep 27

Growing season158 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 24 and returns around October 29.

From the NOAA station Brewerton Lock 23, NY — 7 miles away, elevation 377 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 13103

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Mar 23 – Apr 6

SpinachSow outdoors · Mar 23 – Apr 13

Broccoli, cabbageStart indoors · Feb 23 – Mar 9

Broccoli, cabbageTransplant · Apr 13 – Apr 27

Onion setsPlant outdoors · Apr 6 – Apr 20

PotatoesPlant outdoors · Apr 13 – Apr 27

LettuceSow outdoors · Apr 6 – Apr 20

Carrots, beetsSow outdoors · Apr 13 – Apr 27

TomatoesStart indoors · Mar 9 – Mar 23

TomatoesTransplant · May 11 – May 25

Peppers, eggplantStart indoors · Feb 23 – Mar 9

Peppers, eggplantTransplant · May 18 – Jun 1

BeansSow outdoors · May 11 – May 25

Sweet cornSow outdoors · May 11 – May 25

Cucumbers, squashSow outdoors · May 11 – May 25

Fall lettuce, spinachSow outdoors · Aug 16 – Aug 30

GarlicPlant cloves · Sep 27 – Nov 1

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 4) and first fall frost (Oct 11) 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 13103 came on Apr 10 — 5 days earlier than the 1991–2020 average (Apr 15).

average
Apr 152026
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 Mallory, NY.

Soil in Mallory, NY

The soil mapped at the center of ZIP 13103 is Empeyville — slightly decomposed plant material, moderately well drained.

TextureSlightly decomposed plant materialtop layer

pH4.3strongly acidic; most vegetables like 6.0–7.0

DrainageModerately well drainednatural drainage class

Organic matter75%high

Hydrologic groupB/Dmoderate when drained; wet otherwise

Farmland classFarmland of statewide importanceUSDA classification

Map unit: Empeyville very fine sandy loam, 3 to 8 percent slopes, stony.

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 13103; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Mallory, NY

Summer high81 °Faverage high, July

Winter low12 °Faverage low, February

Hot days7days a year at 90 °F or more

Freezing nights151nights a year at 32 °F or less

Growing degree days2,311base 50 °F — the season’s usable heat

Longest day15 h 24 mindaylight on June 21

Shortest day8 h 58 mindaylight on December 21

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

Precipitation47.5 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: Brewerton Lock 23, NY (7 mi away); precipitation: Brewerton Lock 23, NY (7 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

131675b

West Monroe, NY · 2 mi

130765b

Hastings, NY · 3 mi

130365b

Central Square, NY · 4 mi

130445b

Constantia, NY · 6 mi

Pennellville, NY · 8 mi

130646b

Fair Haven, NY · 9 mi

New York planting zones →

Questions about 13103

What planting zone is ZIP code 13103?

ZIP code 13103 (Mallory, 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 Mallory, NY?

The median last spring frost (32 °F) near 13103 is May 4; after May 19 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Brewerton Lock 23 station.

When is the first frost in Mallory, NY?

The median first fall frost near 13103 is October 11, giving a median frost-free growing season of 158 days.

When should I plant tomatoes in 13103?

Start tomato seeds indoors around Mar 9 – Mar 23 and set transplants outside around May 11 – May 25, one to three weeks after the median last frost.

How much rain and snow does 13103 get?

About 47.5 inches of precipitation a year (NOAA 1991–2020 normals, Brewerton Lock 23 station).

How hot do summers get in Mallory, NY?

The average high peaks at 81 °F in July, with about 7 days a year at 90 °F or more.

What kind of soil does 13103 have?

The USDA soil survey maps Empeyville at the center of ZIP 13103: slightly decomposed plant material, moderately well drained, pH about 4.3 (strongly acidic).

Did spring come early in Mallory, NY in 2026?

Spring leaf-out near 13103 came on Apr 10 in 2026, 5 days earlier than the 1991–2020 average (Apr 15), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Mallory, NY?

Long-day onions: the longest day near 13103 is 15 h 24 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 13103 change?

Yes. The 2012 USDA map put 13103 in zone 5a; the 2023 map puts it in zone 5b. The newer map uses 1991–2020 data and more weather stations.