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

Planting zone for 57022 — Dell Rapids, SD

ZIP code 57022 (Dell Rapids, Minnehaha County) is in USDA zone 4b: the coldest winter night averages −25 to −20 °F. The median last spring frost is May 1 and the first fall frost October 4.

Where ZIP 57022 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 1

First frostOct 4

2012 zone4b

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 4b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Dell Rapids, 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 Dell Rapids, SD

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 15only 10% chance of frost after

First fall frostOctober 4median — 10% chance by Sep 21

Growing season155 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 23 and returns around October 15.

From the NOAA station Sioux Falls 14 Nne, SD — 10 miles away, elevation 1,595 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 57022

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 9 – Aug 23

GarlicPlant cloves · Sep 20 – Oct 25

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 1) and first fall frost (Oct 4) 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 57022 came on Mar 25 — 22 days earlier than the 1991–2020 average (Apr 16).

average
Apr 162026
Mar 25

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).

Soil in Dell Rapids, SD

The soil mapped at the center of ZIP 57022 is Moody — silty clay loam, well drained.

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

pH6.6neutral; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter3.25%moderate

Hydrologic groupCwater soaks in slowly

Farmland classprime farmlandUSDA classification

Map unit: Moody-Nora complex, 2 to 6 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 57022; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Dell Rapids, SD

Summer high83 °Faverage high, July

Winter low6 °Faverage low, January

Hot days11days a year at 90 °F or more

Freezing nights163nights a year at 32 °F or less

Growing degree days2,608base 50 °F — the season’s usable heat

Longest day15 h 28 mindaylight on June 21

Shortest day8 h 54 mindaylight on December 21

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

Precipitation28.7 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: Sioux Falls 14 Nne, SD (10 mi away); precipitation: Garretson 6.9 W, SD (10 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

Garretson, SD · 13 mi

South Dakota planting zones →

Questions about 57022

What planting zone is ZIP code 57022?

ZIP code 57022 (Dell Rapids, 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 Dell Rapids, SD?

The median last spring frost (32 °F) near 57022 is May 1; after May 15 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Sioux Falls 14 Nne station.

When is the first frost in Dell Rapids, SD?

The median first fall frost near 57022 is October 4, giving a median frost-free growing season of 155 days.

When should I plant tomatoes in 57022?

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 57022 get?

About 28.7 inches of precipitation a year (NOAA 1991–2020 normals, Garretson 6.9 W station).

How hot do summers get in Dell Rapids, SD?

The average high peaks at 83 °F in July, with about 11 days a year at 90 °F or more.

What kind of soil does 57022 have?

The USDA soil survey maps Moody at the center of ZIP 57022: silty clay loam, well drained, pH about 6.6 (neutral).

Did spring come early in Dell Rapids, SD in 2026?

Spring leaf-out near 57022 came on Mar 25 in 2026, 22 days earlier than the 1991–2020 average (Apr 16), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Dell Rapids, SD?

Long-day onions: the longest day near 57022 is 15 h 28 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).