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

Planting zone for 58250 — Lankin, ND

ZIP code 58250 (Lankin, Walsh County) is in USDA zone 4a: the coldest winter night averages −30 to −25 °F. The median last spring frost is May 11 and the first fall frost September 28.

Where ZIP 58250 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.

Zone4a−30 to −25 °F
Coldest night−34.4 to −31.7 °C
Last frostMay 11
First frostSep 28
2012 zone4a

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 4a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Lankin, ND…

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 Lankin, ND

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMay 11median — 50% chance of a later frost
Safe for tender plantsMay 25only 10% chance of frost after
First fall frostSeptember 28median — 10% chance by Sep 16
Growing season138 daysfrost-free, median

A hard freeze (28 °F) usually ends around May 2 and returns around October 7.

From the NOAA station Petersburg 2 N, ND — 17 miles away, elevation 1,532 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 58250

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 30 – Apr 13
SpinachSow outdoors · Mar 30 – Apr 20
Broccoli, cabbageStart indoors · Mar 2 – Mar 16
Broccoli, cabbageTransplant · Apr 20 – May 4
Onion setsPlant outdoors · Apr 13 – Apr 27
PotatoesPlant outdoors · Apr 20 – May 4
LettuceSow outdoors · Apr 13 – Apr 27
Carrots, beetsSow outdoors · Apr 20 – May 4
TomatoesStart indoors · Mar 16 – Mar 30
TomatoesTransplant · May 18 – Jun 1
Peppers, eggplantStart indoors · Mar 2 – Mar 16
Peppers, eggplantTransplant · May 25 – Jun 8
BeansSow outdoors · May 18 – Jun 1
Sweet cornSow outdoors · May 18 – Jun 1
Cucumbers, squashSow outdoors · May 18 – Jun 1
Fall lettuce, spinachSow outdoors · Aug 3 – Aug 17
GarlicPlant cloves · Sep 14 – Oct 19
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 11) and first fall frost (Sep 28) 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 58250 came on May 7 — 9 days later than the 1991–2020 average (Apr 28).

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 Lankin, ND

The soil mapped at the center of ZIP 58250 is Vallers — loam, poorly drained.

TextureLoama good balance for most vegetables
pH7.9alkaline; most vegetables like 6.0–7.0
DrainagePoorly drainedconsider raised beds
Organic matter4%moderate
Hydrologic groupB/Dmoderate when drained; wet otherwise
Farmland classNot prime farmlandUSDA classification

Map unit: Vallers, saline-Parnell complex, 0 to 1 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 58250; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Lankin, ND

Summer high79 °Faverage high, July
Winter low−4 °Faverage low, January
Hot days5days a year at 90 °F or more
Freezing nights192nights a year at 32 °F or less
Growing degree days1,982base 50 °F — the season’s usable heat
Longest day16 h 05 mindaylight on June 21
Shortest day8 h 20 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation20.6 inper year, rain and melted snow
Snowfall35 inper year; 113 days with snow on the ground

Average high and low, by month

−10°0°10°20°30°40°50°60°70°80°90°32 °FJanuary: average high 14 °F, low -4 °F 14°−4° JanFebruary: average high 19 °F, low -1 °F 19°−1° FebMarch: average high 31 °F, low 13 °F 31°13° MarApril: average high 50 °F, low 28 °F 50°28° AprMay: average high 65 °F, low 42 °F 65°42° MayJune: average high 74 °F, low 53 °F 74°53° JunJuly: average high 79 °F, low 58 °F 79°58° JulAugust: average high 78 °F, low 55 °F 78°55° AugSeptember: average high 69 °F, low 45 °F 69°45° SepOctober: average high 52 °F, low 32 °F 52°32° OctNovember: average high 34 °F, low 17 °F 34°17° NovDecember: average high 20 °F, low 4 °F 20°4° Dec

Precipitation by month inches · ❄ = snowfall

0″1″2″3″4″January: 0.40 in precipitation, 5.7 in snowfall 0.4❄6 JanFebruary: 0.41 in precipitation, 4.5 in snowfall 0.4❄5 FebMarch: 0.68 in precipitation, 4.5 in snowfall 0.7❄5 MarApril: 1.18 in precipitation, 2.7 in snowfall 1.2❄3 AprMay: 2.87 in precipitation, 0.5 in snowfall 2.9❄1 MayJune: 3.98 in precipitation 4.0 JunJuly: 3.51 in precipitation 3.5 JulAugust: 2.83 in precipitation 2.8 AugSeptember: 2.02 in precipitation 2.0 SepOctober: 1.39 in precipitation, 1.7 in snowfall 1.4❄2 OctNovember: 0.75 in precipitation, 6 in snowfall 0.8❄6 NovDecember: 0.54 in precipitation, 8.9 in snowfall 0.5❄9 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Petersburg 2 N, ND (17 mi away); precipitation: Adams 7 Ssw, ND (6 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.

582244a
Dahlen, ND · 8 mi
582103b
Adams, ND · 10 mi
582314a
Fordville, ND · 10 mi
582704a
Park River, ND · 13 mi
583214a
Brocket, ND · 14 mi
583454a
Lawton, ND · 16 mi
582594a
Michigan, ND · 18 mi
582724a
Petersburg, ND · 19 mi

North Dakota planting zones →

Questions about 58250

What planting zone is ZIP code 58250?

ZIP code 58250 (Lankin, ND) is in USDA hardiness zone 4a on the 2023 map: the coldest night of an average winter reaches −30 to −25 °F (−34.4 to −31.7 °C).

When is the last frost in Lankin, ND?

The median last spring frost (32 °F) near 58250 is May 11; after May 25 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Petersburg 2 N station.

When is the first frost in Lankin, ND?

The median first fall frost near 58250 is September 28, giving a median frost-free growing season of 138 days.

When should I plant tomatoes in 58250?

Start tomato seeds indoors around Mar 16 – Mar 30 and set transplants outside around May 18 – Jun 1, one to three weeks after the median last frost.

How much rain and snow does 58250 get?

About 20.6 inches of precipitation a year and 35 inches of snowfall (NOAA 1991–2020 normals, Adams 7 Ssw station).

How hot do summers get in Lankin, ND?

The average high peaks at 79 °F in July, with about 5 days a year at 90 °F or more.

What kind of soil does 58250 have?

The USDA soil survey maps Vallers at the center of ZIP 58250: loam, poorly drained, pH about 7.9 (alkaline).

Did spring come early in Lankin, ND in 2026?

Spring leaf-out near 58250 came on May 7 in 2026, 9 days later than the 1991–2020 average (Apr 28), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Lankin, ND?

Long-day onions: the longest day near 58250 is 16 h 05 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).