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

Planting zone for 57241 — Hayti, SD

ZIP code 57241 (Hayti, Hamlin County) is in USDA zone 4b: the coldest winter night averages −25 to −20 °F. The median last spring frost is May 6 and the first fall frost October 1.

Where ZIP 57241 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 6

First frostOct 1

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 Hayti, SD…

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 Hayti, SD

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostMay 6median — 50% chance of a later frost

Safe for tender plantsMay 20only 10% chance of frost after

First fall frostOctober 1median — 10% chance by Sep 19

Growing season145 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 29 and returns around October 11.

From the NOAA station Castlewood #2, SD — 9 miles away, elevation 1,690 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 57241

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Mar 25 – Apr 8

SpinachSow outdoors · Mar 25 – Apr 15

Broccoli, cabbageStart indoors · Feb 25 – Mar 11

Broccoli, cabbageTransplant · Apr 15 – Apr 29

Onion setsPlant outdoors · Apr 8 – Apr 22

PotatoesPlant outdoors · Apr 15 – Apr 29

LettuceSow outdoors · Apr 8 – Apr 22

Carrots, beetsSow outdoors · Apr 15 – Apr 29

TomatoesStart indoors · Mar 11 – Mar 25

TomatoesTransplant · May 13 – May 27

Peppers, eggplantStart indoors · Feb 25 – Mar 11

Peppers, eggplantTransplant · May 20 – Jun 3

BeansSow outdoors · May 13 – May 27

Sweet cornSow outdoors · May 13 – May 27

Cucumbers, squashSow outdoors · May 13 – May 27

Fall lettuce, spinachSow outdoors · Aug 6 – Aug 20

GarlicPlant cloves · Sep 17 – Oct 22

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 6) and first fall frost (Oct 1) 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 57241 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 4b in South Dakota

430 plants native to the lower 48 states, recorded in South Dakota, 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 Hayti, SD.

Soil in Hayti, SD

The soil mapped at the center of ZIP 57241 is Sioux — gravelly loam, excessively drained.

TextureGravelly loama good balance for most vegetables

pH7.5slightly alkaline; most vegetables like 6.0–7.0

DrainageExcessively drainednatural drainage class

Organic matter2%moderate

Hydrologic groupBwater soaks in moderately

Farmland classNot prime farmlandUSDA classification

Map unit: Sioux-Renshaw complex, coteau, 9 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 57241; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Hayti, SD

Summer high83 °Faverage high, July

Winter low3 °Faverage low, January

Hot days13days a year at 90 °F or more

Freezing nights182nights a year at 32 °F or less

Growing degree days2,344base 50 °F — the season’s usable heat

Longest day15 h 35 mindaylight on June 21

Shortest day8 h 48 mindaylight on December 21

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

Precipitation23.7 inper year, rain and melted snow

Snowfall34 inper year; 91 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: Castlewood #2, SD (9 mi away); precipitation: Hayti, SD (2 mi away). 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.

572484b

Lake Norden, SD · 8 mi

572424b

Hazel, SD · 9 mi

572234a

Castlewood, SD · 11 mi

Estelline, SD · 17 mi

572014b

Watertown, SD · 18 mi

South Dakota planting zones →

Questions about 57241

What planting zone is ZIP code 57241?

ZIP code 57241 (Hayti, SD) 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 Hayti, SD?

The median last spring frost (32 °F) near 57241 is May 6; after May 20 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Castlewood #2 station.

When is the first frost in Hayti, SD?

The median first fall frost near 57241 is October 1, giving a median frost-free growing season of 145 days.

When should I plant tomatoes in 57241?

Start tomato seeds indoors around Mar 11 – Mar 25 and set transplants outside around May 13 – May 27, one to three weeks after the median last frost.

How much rain and snow does 57241 get?

About 23.7 inches of precipitation a year and 34 inches of snowfall (NOAA 1991–2020 normals, Hayti station).

How hot do summers get in Hayti, SD?

The average high peaks at 83 °F in July, with about 13 days a year at 90 °F or more.

What kind of soil does 57241 have?

The USDA soil survey maps Sioux at the center of ZIP 57241: gravelly loam, excessively drained, pH about 7.5 (slightly alkaline).

Did spring come early in Hayti, SD in 2026?

Spring leaf-out near 57241 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 Hayti, SD?

Long-day onions: the longest day near 57241 is 15 h 35 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 57241 change?

Yes. The 2012 USDA map put 57241 in zone 4a; the 2023 map puts it in zone 4b. The newer map uses 1991–2020 data and more weather stations.