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

Planting zone for 58480 — Sanborn, ND

ZIP code 58480 (Sanborn, Barnes County) is in USDA zone 4a: the coldest winter night averages −30 to −25 °F. The median last spring frost is May 13 and the first fall frost September 26.

Where ZIP 58480 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 13
First frostSep 26
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 Sanborn, 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 Sanborn, ND

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMay 13median — 50% chance of a later frost
Safe for tender plantsMay 25only 10% chance of frost after
First fall frostSeptember 26median — 10% chance by Sep 14
Growing season136 daysfrost-free, median

A hard freeze (28 °F) usually ends around May 4 and returns around October 5.

From the NOAA station Valley City 3 Nnw, ND — 11 miles away, elevation 1,211 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 58480

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Apr 1 – Apr 15
SpinachSow outdoors · Apr 1 – Apr 22
Broccoli, cabbageStart indoors · Mar 4 – Mar 18
Broccoli, cabbageTransplant · Apr 22 – May 6
Onion setsPlant outdoors · Apr 15 – Apr 29
PotatoesPlant outdoors · Apr 22 – May 6
LettuceSow outdoors · Apr 15 – Apr 29
Carrots, beetsSow outdoors · Apr 22 – May 6
TomatoesStart indoors · Mar 18 – Apr 1
TomatoesTransplant · May 20 – Jun 3
Peppers, eggplantStart indoors · Mar 4 – Mar 18
Peppers, eggplantTransplant · May 27 – Jun 10
BeansSow outdoors · May 20 – Jun 3
Sweet cornSow outdoors · May 20 – Jun 3
Cucumbers, squashSow outdoors · May 20 – Jun 3
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 13) 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 58480 came on Apr 23 — about the same time as the 1991–2020 average (Apr 23).

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 4a in North Dakota

342 plants native to the lower 48 states, recorded in North Dakota, and rated by the USDA to survive −30 °F or colder — the bottom of zone 4a. Each links to its USDA PLANTS profile.

Trees 21

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 56

alderleaf buckthorn3 ft · blooms late spring · low shade tolerance · to −33 °FAmerican black currant3 ft · blooms early spring · to −46 °FAmerican hazelnut10 ft · blooms spring · medium shade tolerance · to −33 °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 °F

Wildflowers & perennials 146

alkali buttercup1 ft · blooms late spring · low shade tolerance · to −38 °Falpine sweetvetch2 ft · blooms early summer · high shade tolerance · to −62 °FAmerican bur-reed3 ft · blooms indeterminate · medium shade tolerance · to −33 °FAmerican eelgrass1 ft · blooms mid summer · high shade tolerance · to −33 °FAmerican licorice4 ft · blooms late spring · medium shade tolerance · to −38 °FAmerican speedwell0.8 ft · blooms mid summer · low shade tolerance · to −38 °F

Grasses 110

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 °Farctic brome3 ft · blooms early summer · low shade tolerance · to −33 °Fawlfruit sedge4 ft · blooms mid spring · low shade tolerance · to −38 °FBebb's sedge3 ft · blooms late spring · low shade tolerance · to −38 °F

Vines 4

American bittersweet15 ft · blooms spring · low shade tolerance · to −38 °Fdevil's darning needles15 ft · blooms mid summer · medium shade tolerance · to −38 °Friverbank grape45 ft · blooms late spring · medium shade tolerance · to −33 °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 Sanborn, ND.

Soil in Sanborn, ND

The soil mapped at the center of ZIP 58480 is Barnes — loam, well drained.

TextureLoama good balance for most vegetables
pH7.0neutral; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter4%moderate
Hydrologic groupBwater soaks in moderately
Farmland classprime farmlandUSDA classification

Map unit: Barnes-Svea 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 58480; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Sanborn, ND

Summer high81 °Faverage high, July
Winter low−2 °Faverage low, January
Hot days10days a year at 90 °F or more
Freezing nights192nights a year at 32 °F or less
Growing degree days2,097base 50 °F — the season’s usable heat
Longest day15 h 53 mindaylight on June 21
Shortest day8 h 31 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation21.5 inper year, rain and melted snow

Average high and low, by month

−10°0°10°20°30°40°50°60°70°80°90°32 °FJanuary: average high 18 °F, low -2 °F 18°−2° JanFebruary: average high 23 °F, low 1 °F 23°1° FebMarch: average high 36 °F, low 14 °F 36°14° MarApril: average high 53 °F, low 28 °F 53°28° AprMay: average high 67 °F, low 41 °F 67°41° MayJune: average high 76 °F, low 53 °F 76°53° JunJuly: average high 81 °F, low 57 °F 81°57° JulAugust: average high 80 °F, low 54 °F 80°54° AugSeptember: average high 71 °F, low 45 °F 71°45° SepOctober: average high 56 °F, low 32 °F 56°32° OctNovember: average high 38 °F, low 18 °F 38°18° NovDecember: average high 24 °F, low 6 °F 24°6° Dec

Precipitation by month inches

0″1″2″3″4″January: 0.52 in precipitation 0.5 JanFebruary: 0.50 in precipitation 0.5 FebMarch: 0.81 in precipitation 0.8 MarApril: 1.22 in precipitation 1.2 AprMay: 3.21 in precipitation 3.2 MayJune: 3.59 in precipitation 3.6 JunJuly: 3.02 in precipitation 3.0 JulAugust: 2.59 in precipitation 2.6 AugSeptember: 2.73 in precipitation 2.7 SepOctober: 1.91 in precipitation 1.9 OctNovember: 0.69 in precipitation 0.7 NovDecember: 0.67 in precipitation 0.7 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Valley City 3 Nnw, ND (11 mi away); precipitation: Valley City 3 Nnw, ND (11 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 4a.

584814a
Spiritwood, ND · 8 mi
584794a
Rogers, ND · 10 mi
580724a
Valley City, ND · 12 mi
584924a
Wimbledon, ND · 17 mi
584974a
Ypsilanti, ND · 17 mi
584294a
Dazey, ND · 18 mi
584614a
Litchville, ND · 21 mi
584024a
Jamestown, ND · 21 mi

North Dakota planting zones →

Questions about 58480

What planting zone is ZIP code 58480?

ZIP code 58480 (Sanborn, 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 Sanborn, ND?

The median last spring frost (32 °F) near 58480 is May 13; after May 25 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Valley City 3 Nnw station.

When is the first frost in Sanborn, ND?

The median first fall frost near 58480 is September 26, giving a median frost-free growing season of 136 days.

When should I plant tomatoes in 58480?

Start tomato seeds indoors around Mar 18 – Apr 1 and set transplants outside around May 20 – Jun 3, one to three weeks after the median last frost.

How much rain and snow does 58480 get?

About 21.5 inches of precipitation a year (NOAA 1991–2020 normals, Valley City 3 Nnw station).

How hot do summers get in Sanborn, ND?

The average high peaks at 81 °F in July, with about 10 days a year at 90 °F or more.

What kind of soil does 58480 have?

The USDA soil survey maps Barnes at the center of ZIP 58480: loam, well drained, pH about 7.0 (neutral).

Did spring come early in Sanborn, ND in 2026?

Spring leaf-out near 58480 came on Apr 23 in 2026, about the same as the 1991–2020 average (Apr 23), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Sanborn, ND?

Long-day onions: the longest day near 58480 is 15 h 53 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).