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

Planting zone for 13625 — Colton, NY

ZIP code 13625 (Colton, St. Lawrence County) is in USDA zone 4b: the coldest winter night averages −25 to −20 °F. The median last spring frost is May 5 and the first fall frost October 8.

Where ZIP 13625 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.

Zone4b−25 to −20 °F

Coldest night−31.7 to −28.9 °C

Last frostMay 5

First frostOct 8

2012 zone4a

Was 4a 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 4b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Colton, 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 Colton, NY

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostMay 5median — 50% chance of a later frost

Safe for tender plantsMay 21only 10% chance of frost after

First fall frostOctober 8median — 10% chance by Sep 26

Growing season156 daysfrost-free, median

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

From the NOAA station Colton 2 N, NY — 4 miles away, elevation 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 13625

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Mar 24 – Apr 7

SpinachSow outdoors · Mar 24 – Apr 14

Broccoli, cabbageStart indoors · Feb 24 – Mar 10

Broccoli, cabbageTransplant · Apr 14 – Apr 28

Onion setsPlant outdoors · Apr 7 – Apr 21

PotatoesPlant outdoors · Apr 14 – Apr 28

LettuceSow outdoors · Apr 7 – Apr 21

Carrots, beetsSow outdoors · Apr 14 – Apr 28

TomatoesStart indoors · Mar 10 – Mar 24

TomatoesTransplant · May 12 – May 26

Peppers, eggplantStart indoors · Feb 24 – Mar 10

Peppers, eggplantTransplant · May 19 – Jun 2

BeansSow outdoors · May 12 – May 26

Sweet cornSow outdoors · May 12 – May 26

Cucumbers, squashSow outdoors · May 12 – May 26

Fall lettuce, spinachSow outdoors · Aug 13 – Aug 27

GarlicPlant cloves · Sep 24 – Oct 29

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 5) and first fall frost (Oct 8) 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 13625 came on Apr 16 — 6 days earlier than the 1991–2020 average (Apr 22).

average
Apr 222026
Apr 16

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 4b in New York

526 plants native to the lower 48 states, recorded in New York, and rated by the USDA to survive −25 °F or colder — the bottom of zone 4b. 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 Colton, NY.

Soil in Colton, NY

The soil mapped at the center of ZIP 13625 is Pyrities — fine sandy loam, well drained.

TextureFine sandy loamdrains and warms fast; dries out and needs more feeding

pH6.6neutral; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter4%moderate

Hydrologic groupBwater soaks in moderately

Farmland classNot prime farmlandUSDA classification

Map unit: Pyrities fine sandy loam, 15 to 25 percent slopes, very 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 13625; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Colton, NY

Summer high80 °Faverage high, July

Winter low6 °Faverage low, January

Hot days8days a year at 90 °F or more

Freezing nights162nights a year at 32 °F or less

Growing degree days2,219base 50 °F — the season’s usable heat

Longest day15 h 33 mindaylight on June 21

Shortest day8 h 49 mindaylight on December 21

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

Precipitation42 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: Colton 2 N, NY (4 mi away); precipitation: Colton 2 N, NY (4 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.

136474b

Hannawa Falls, NY · 6 mi

136764b

Potsdam, NY · 8 mi

136874a

South Colton, NY · 8 mi

136994b

Potsdam, NY · 9 mi

136964b

West Stockholm, NY · 11 mi

136174b

Canton, NY · 12 mi

129224a

Childwold, NY · 13 mi

136724a

Parishville, NY · 13 mi

New York planting zones →

Questions about 13625

What planting zone is ZIP code 13625?

ZIP code 13625 (Colton, NY) is in USDA hardiness zone 4b on the 2023 map: the coldest night of an average winter reaches −25 to −20 °F (−31.7 to −28.9 °C).

When is the last frost in Colton, NY?

The median last spring frost (32 °F) near 13625 is May 5; after May 21 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Colton 2 N station.

When is the first frost in Colton, NY?

The median first fall frost near 13625 is October 8, giving a median frost-free growing season of 156 days.

When should I plant tomatoes in 13625?

Start tomato seeds indoors around Mar 10 – Mar 24 and set transplants outside around May 12 – May 26, one to three weeks after the median last frost.

How much rain and snow does 13625 get?

About 42 inches of precipitation a year (NOAA 1991–2020 normals, Colton 2 N station).

How hot do summers get in Colton, NY?

The average high peaks at 80 °F in July, with about 8 days a year at 90 °F or more.

What kind of soil does 13625 have?

The USDA soil survey maps Pyrities at the center of ZIP 13625: fine sandy loam, well drained, pH about 6.6 (neutral).

Did spring come early in Colton, NY in 2026?

Spring leaf-out near 13625 came on Apr 16 in 2026, 6 days earlier than the 1991–2020 average (Apr 22), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Colton, NY?

Long-day onions: the longest day near 13625 is 15 h 33 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 13625 change?

Yes. The 2012 USDA map put 13625 in zone 4a; the 2023 map puts it in zone 4b. The newer map uses 1991–2020 data and more weather stations.