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

Planting zone for 58269 — Osnabrock, ND

ZIP code 58269 (Osnabrock, Cavalier County) is in USDA zone 3b: the coldest winter night averages −35 to −30 °F. The median last spring frost is May 17 and the first fall frost September 26.

Where ZIP 58269 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.

Zone3b−35 to −30 °F
Coldest night−37.2 to −34.4 °C
Last frostMay 17
First frostSep 26
2012 zone3b

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 3b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Osnabrock, 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 Osnabrock, ND

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMay 17median — 50% chance of a later frost
Safe for tender plantsMay 30only 10% chance of frost after
First fall frostSeptember 26median — 10% chance by Sep 13
Growing season132 daysfrost-free, median

A hard freeze (28 °F) usually ends around May 7 and returns around October 4.

From the NOAA station Langdon Exp Farm, ND — 9 miles away, elevation 1,614 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 58269

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Apr 5 – Apr 19
SpinachSow outdoors · Apr 5 – Apr 26
Broccoli, cabbageStart indoors · Mar 8 – Mar 22
Broccoli, cabbageTransplant · Apr 26 – May 10
Onion setsPlant outdoors · Apr 19 – May 3
PotatoesPlant outdoors · Apr 26 – May 10
LettuceSow outdoors · Apr 19 – May 3
Carrots, beetsSow outdoors · Apr 26 – May 10
TomatoesStart indoors · Mar 22 – Apr 5
TomatoesTransplant · May 24 – Jun 7
Peppers, eggplantStart indoors · Mar 8 – Mar 22
Peppers, eggplantTransplant · May 31 – Jun 14
BeansSow outdoors · May 24 – Jun 7
Sweet cornSow outdoors · May 24 – Jun 7
Cucumbers, squashSow outdoors · May 24 – Jun 7
Fall lettuce, spinachSow outdoors · Aug 1 – Aug 15
GarlicPlant cloves · Sep 12 – Oct 17
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 17) and first fall frost (Sep 26) 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 58269 came on May 8 — 8 days later than the 1991–2020 average (Apr 30).

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 3b in North Dakota

249 plants native to the lower 48 states, recorded in North Dakota, and rated by the USDA to survive −35 °F or colder — the bottom of zone 3b. Each links to its USDA PLANTS profile.

Trees 20

American basswood100 ft · blooms late spring · low shade tolerance · to −46 °FAmerican elm120 ft · blooms early spring · medium shade tolerance · to −46 °Fbalsam poplar80 ft · blooms late spring · high shade tolerance · to −79 °Fbigtooth aspen65 ft · blooms mid spring · high shade tolerance · to −43 °Fblack ash65 ft · blooms early spring · high shade tolerance · to −47 °Fblack locust60 ft · blooms spring · high shade tolerance · to −37 °F

Shrubs 42

American black currant3 ft · blooms early spring · to −46 °FAmerican plum24 ft · blooms mid spring · high shade tolerance · to −38 °Fbeaked hazelnut15 ft · blooms early spring · low shade tolerance · to −47 °Fbig sagebrush4 ft · blooms mid summer · high shade tolerance · to −43 °Fblack hawthorn15 ft · blooms mid spring · medium shade tolerance · to −47 °Fbog birch20 ft · blooms mid spring · high shade tolerance · to −38 °F

Wildflowers & perennials 91

alkali buttercup1 ft · blooms late spring · low shade tolerance · to −38 °Falpine sweetvetch2 ft · blooms early summer · high shade tolerance · to −62 °FAmerican licorice4 ft · blooms late spring · medium shade tolerance · to −38 °FAmerican speedwell0.8 ft · blooms mid summer · low shade tolerance · to −38 °FAmerican vetch1.3 ft · blooms late spring · high shade tolerance · to −38 °FAmerican water horehound1.8 ft · blooms early summer · low shade tolerance · to −38 °F

Grasses 88

alkali cordgrass3 ft · blooms late summer · high shade tolerance · to −38 °Falkali sacaton3 ft · blooms mid summer · high shade tolerance · to −38 °Fanalogue sedge1.5 ft · blooms late spring · medium shade tolerance · to −38 °Fawlfruit sedge4 ft · blooms mid spring · low shade tolerance · to −38 °FBebb's sedge3 ft · blooms late spring · low shade tolerance · to −38 °FBicknell's sedge3 ft · blooms late spring · low shade tolerance · to −38 °F

Vines 3

American bittersweet15 ft · blooms spring · low shade tolerance · to −38 °Fdevil's darning needles15 ft · blooms mid summer · medium shade tolerance · to −38 °Fwestern white clematis1 ft · blooms mid summer · medium shade tolerance · to −38 °F

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 Osnabrock, ND.

Soil in Osnabrock, ND

The soil mapped at the center of ZIP 58269 is Svea — loam, moderately well drained.

TextureLoama good balance for most vegetables
pH7.0neutral; most vegetables like 6.0–7.0
DrainageModerately well drainednatural drainage class
Organic matter5.5%high
Hydrologic groupBwater soaks in moderately
Farmland classFarmland of statewide importanceUSDA classification

Map unit: Svea-Cresbard loams, 0 to 3 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 58269; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Osnabrock, ND

Summer high77 °Faverage high, July
Winter low−5 °Faverage low, January
Hot days3days a year at 90 °F or more
Freezing nights200nights a year at 32 °F or less
Growing degree days1,749base 50 °F — the season’s usable heat
Longest day16 h 09 mindaylight on June 21
Shortest day8 h 16 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation20.8 inper year, rain and melted snow
Snowfall47 inper year; 144 days with snow on the ground

Average high and low, by month

−20°−10°0°10°20°30°40°50°60°70°80°90°32 °FJanuary: average high 13 °F, low -5 °F 13°−5° JanFebruary: average high 17 °F, low -2 °F 17°−2° FebMarch: average high 30 °F, low 12 °F 30°12° MarApril: average high 48 °F, low 28 °F 48°28° AprMay: average high 64 °F, low 40 °F 64°40° MayJune: average high 72 °F, low 52 °F 72°52° JunJuly: average high 77 °F, low 56 °F 77°56° JulAugust: average high 77 °F, low 54 °F 77°54° AugSeptember: average high 67 °F, low 44 °F 67°44° SepOctober: average high 51 °F, low 31 °F 51°31° OctNovember: average high 32 °F, low 16 °F 32°16° NovDecember: average high 18 °F, low 2 °F 18°2° Dec

Precipitation by month inches · ❄ = snowfall

0″1″2″3″4″5″January: 0.45 in precipitation, 8.2 in snowfall 0.5❄8 JanFebruary: 0.36 in precipitation, 6.1 in snowfall 0.4❄6 FebMarch: 0.59 in precipitation, 6.1 in snowfall 0.6❄6 MarApril: 1.14 in precipitation, 4.4 in snowfall 1.1❄4 AprMay: 3.13 in precipitation, 1.2 in snowfall 3.1❄1 MayJune: 4.17 in precipitation 4.2 JunJuly: 3.44 in precipitation 3.4 JulAugust: 2.45 in precipitation 2.5 AugSeptember: 2.11 in precipitation 2.1 SepOctober: 1.52 in precipitation, 2.6 in snowfall 1.5❄3 OctNovember: 0.75 in precipitation, 8.1 in snowfall 0.8❄8 NovDecember: 0.64 in precipitation, 10.6 in snowfall 0.6❄11 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Langdon Exp Farm, ND (9 mi away); precipitation: Langdon Exp Farm, ND (9 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.

582603b
Milton, ND · 7 mi
582493b
Langdon, ND · 12 mi
582624a
Mountain, ND · 13 mi
582293b
Fairdale, ND · 13 mi
583553b
Nekoma, ND · 14 mi
582274a
Edinburg, ND · 16 mi
582824a
Walhalla, ND · 17 mi
582103b
Adams, ND · 20 mi

North Dakota planting zones →

Questions about 58269

What planting zone is ZIP code 58269?

ZIP code 58269 (Osnabrock, ND) is in USDA hardiness zone 3b on the 2023 map: the coldest night of an average winter reaches −35 to −30 °F (−37.2 to −34.4 °C).

When is the last frost in Osnabrock, ND?

The median last spring frost (32 °F) near 58269 is May 17; after May 30 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Langdon Exp Farm station.

When is the first frost in Osnabrock, ND?

The median first fall frost near 58269 is September 26, giving a median frost-free growing season of 132 days.

When should I plant tomatoes in 58269?

Start tomato seeds indoors around Mar 22 – Apr 5 and set transplants outside around May 24 – Jun 7, one to three weeks after the median last frost.

How much rain and snow does 58269 get?

About 20.8 inches of precipitation a year and 47 inches of snowfall (NOAA 1991–2020 normals, Langdon Exp Farm station).

How hot do summers get in Osnabrock, ND?

The average high peaks at 77 °F in July, with about 3 days a year at 90 °F or more.

What kind of soil does 58269 have?

The USDA soil survey maps Svea at the center of ZIP 58269: loam, moderately well drained, pH about 7.0 (neutral).

Did spring come early in Osnabrock, ND in 2026?

Spring leaf-out near 58269 came on May 8 in 2026, 8 days later than the 1991–2020 average (Apr 30), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Osnabrock, ND?

Long-day onions: the longest day near 58269 is 16 h 09 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).