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

Planting zone for 57776 — Redig, SD

ZIP code 57776 (Redig, Harding County) is in USDA zone 4b: the coldest winter night averages −25 to −20 °F. The median last spring frost is May 15 and the first fall frost September 24.

Where ZIP 57776 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 15

First frostSep 24

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 Redig, 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 Redig, SD

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostMay 15median — 50% chance of a later frost

Safe for tender plantsMay 27only 10% chance of frost after

First fall frostSeptember 24median — 10% chance by Sep 9

Growing season131 daysfrost-free, median

A hard freeze (28 °F) usually ends around May 5 and returns around October 2.

From the NOAA station Redig 11 Ne, SD — 12 miles away, elevation 3,071 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 57776

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Apr 3 – Apr 17

SpinachSow outdoors · Apr 3 – Apr 24

Broccoli, cabbageStart indoors · Mar 6 – Mar 20

Broccoli, cabbageTransplant · Apr 24 – May 8

Onion setsPlant outdoors · Apr 17 – May 1

PotatoesPlant outdoors · Apr 24 – May 8

LettuceSow outdoors · Apr 17 – May 1

Carrots, beetsSow outdoors · Apr 24 – May 8

TomatoesStart indoors · Mar 20 – Apr 3

TomatoesTransplant · May 22 – Jun 5

Peppers, eggplantStart indoors · Mar 6 – Mar 20

Peppers, eggplantTransplant · May 29 – Jun 12

BeansSow outdoors · May 22 – Jun 5

Sweet cornSow outdoors · May 22 – Jun 5

Cucumbers, squashSow outdoors · May 22 – Jun 5

Fall lettuce, spinachSow outdoors · Jul 30 – Aug 13

GarlicPlant cloves · Sep 10 – Oct 15

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 15) and first fall frost (Sep 24) 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 57776 came on Mar 24 — 20 days earlier than the 1991–2020 average (Apr 13).

average
Apr 132026
Mar 24

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 Redig, SD.

Soil in Redig, SD

The soil mapped at the center of ZIP 57776 is Twilight — fine sandy loam, well drained.

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

pH7.0neutral; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter2%moderate

Hydrologic groupBwater soaks in moderately

Farmland classNot prime farmlandUSDA classification

Map unit: Twilight fine sandy loam, 6 to 9 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 57776; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Redig, SD

Summer high87 °Faverage high, July

Winter low9 °Faverage low, January

Hot days28days a year at 90 °F or more

Freezing nights183nights a year at 32 °F or less

Growing degree days2,355base 50 °F — the season’s usable heat

Longest day15 h 39 mindaylight on June 21

Shortest day8 h 44 mindaylight on December 21

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

Precipitation16 inper year, rain and melted snow

Snowfall51 inper year; 73 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: Redig 11 Ne, SD (12 mi away); precipitation: Redig 11 Ne, SD (12 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 4b.

Belle Fourche, SD · 28 mi

576514b

Reva, SD · 28 mi

577244b

Camp Crook, SD · 33 mi

South Dakota planting zones →

Questions about 57776

What planting zone is ZIP code 57776?

ZIP code 57776 (Redig, 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 Redig, SD?

The median last spring frost (32 °F) near 57776 is May 15; after May 27 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Redig 11 Ne station.

When is the first frost in Redig, SD?

The median first fall frost near 57776 is September 24, giving a median frost-free growing season of 131 days.

When should I plant tomatoes in 57776?

Start tomato seeds indoors around Mar 20 – Apr 3 and set transplants outside around May 22 – Jun 5, one to three weeks after the median last frost.

How much rain and snow does 57776 get?

About 16 inches of precipitation a year and 51 inches of snowfall (NOAA 1991–2020 normals, Redig 11 Ne station).

How hot do summers get in Redig, SD?

The average high peaks at 87 °F in July, with about 28 days a year at 90 °F or more.

What kind of soil does 57776 have?

The USDA soil survey maps Twilight at the center of ZIP 57776: fine sandy loam, well drained, pH about 7.0 (neutral).

Did spring come early in Redig, SD in 2026?

Spring leaf-out near 57776 came on Mar 24 in 2026, 20 days earlier than the 1991–2020 average (Apr 13), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Redig, SD?

Long-day onions: the longest day near 57776 is 15 h 39 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 57776 change?

Yes. The 2012 USDA map put 57776 in zone 4a; the 2023 map puts it in zone 4b. The newer map uses 1991–2020 data and more weather stations.