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

Planting zone for 58030 — Fairmount, ND

ZIP code 58030 (Fairmount, Richland County) is in USDA zone 4a: the coldest winter night averages −30 to −25 °F. The median last spring frost is May 4 and the first fall frost October 3.

Where ZIP 58030 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 4
First frostOct 3
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 Fairmount, 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 Fairmount, ND

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMay 4median — 50% chance of a later frost
Safe for tender plantsMay 17only 10% chance of frost after
First fall frostOctober 3median — 10% chance by Sep 21
Growing season152 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 24 and returns around October 14.

From the NOAA station Victor 4 N, SD — 11 miles away, elevation 1,096 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 58030

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 23 – Apr 6
SpinachSow outdoors · Mar 23 – Apr 13
Broccoli, cabbageStart indoors · Feb 23 – Mar 9
Broccoli, cabbageTransplant · Apr 13 – Apr 27
Onion setsPlant outdoors · Apr 6 – Apr 20
PotatoesPlant outdoors · Apr 13 – Apr 27
LettuceSow outdoors · Apr 6 – Apr 20
Carrots, beetsSow outdoors · Apr 13 – Apr 27
TomatoesStart indoors · Mar 9 – Mar 23
TomatoesTransplant · May 11 – May 25
Peppers, eggplantStart indoors · Feb 23 – Mar 9
Peppers, eggplantTransplant · May 18 – Jun 1
BeansSow outdoors · May 11 – May 25
Sweet cornSow outdoors · May 11 – May 25
Cucumbers, squashSow outdoors · May 11 – May 25
Fall lettuce, spinachSow outdoors · Aug 8 – Aug 22
GarlicPlant cloves · Sep 19 – Oct 24
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 4) and first fall frost (Oct 3) 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 58030 came on Apr 21 — about the same time as the 1991–2020 average (Apr 20).

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 Fairmount, ND.

Soil in Fairmount, ND

The soil mapped at the center of ZIP 58030 is Antler — clay loam, somewhat poorly drained.

TextureClay loamholds water and nutrients; slow to drain and warm up
pH7.0neutral; most vegetables like 6.0–7.0
DrainageSomewhat poorly drainedconsider raised beds
Organic matter4%moderate
Hydrologic groupCwater soaks in slowly
Farmland classPrime farmland if drainedUSDA classification

Map unit: Antler-Mustinka complex, 0 to 2 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 58030; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Fairmount, ND

Summer high82 °Faverage high, July
Winter low1 °Faverage low, January
Hot days8days a year at 90 °F or more
Freezing nights177nights a year at 32 °F or less
Growing degree days2,355base 50 °F — the season’s usable heat
Longest day15 h 45 mindaylight on June 21
Shortest day8 h 38 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation25.8 inper year, rain and melted snow
Snowfall49 inper year; 103 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 20 °F, low 1 °F 20°1° JanFebruary: average high 24 °F, low 4 °F 24°4° FebMarch: average high 37 °F, low 18 °F 37°18° MarApril: average high 53 °F, low 31 °F 53°31° AprMay: average high 68 °F, low 45 °F 68°45° MayJune: average high 77 °F, low 56 °F 77°56° JunJuly: average high 82 °F, low 60 °F 82°60° JulAugust: average high 80 °F, low 57 °F 80°57° AugSeptember: average high 72 °F, low 47 °F 72°47° SepOctober: average high 57 °F, low 34 °F 57°34° OctNovember: average high 39 °F, low 21 °F 39°21° NovDecember: average high 25 °F, low 9 °F 25°9° Dec

Precipitation by month inches · ❄ = snowfall

0″1″2″3″4″5″January: 0.78 in precipitation, 10 in snowfall 0.8❄10 JanFebruary: 0.69 in precipitation, 8.2 in snowfall 0.7❄8 FebMarch: 1.20 in precipitation, 7.7 in snowfall 1.2❄8 MarApril: 2.30 in precipitation, 6.2 in snowfall 2.3❄6 AprMay: 3.07 in precipitation 3.1 MayJune: 4.17 in precipitation 4.2 JunJuly: 3.63 in precipitation 3.6 JulAugust: 2.89 in precipitation 2.9 AugSeptember: 2.72 in precipitation 2.7 SepOctober: 2.46 in precipitation, 1.3 in snowfall 2.5❄1 OctNovember: 1.03 in precipitation, 6 in snowfall 1.0❄6 NovDecember: 0.84 in precipitation, 9.9 in snowfall 0.8❄10 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Victor 4 N, SD (11 mi away); precipitation: Victor 4 N, SD (11 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.

580414b
Hankinson, ND · 11 mi
565834a
Tintah, MN · 13 mi
572604b
Rosholt, SD · 13 mi
565224a
Campbell, MN · 15 mi
580744a
Wahpeton, ND · 16 mi
562964b
Wheaton, MN · 17 mi
565654a
Nashua, MN · 17 mi
580764a
Wahpeton, ND · 17 mi

North Dakota planting zones →

Questions about 58030

What planting zone is ZIP code 58030?

ZIP code 58030 (Fairmount, 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 Fairmount, ND?

The median last spring frost (32 °F) near 58030 is May 4; after May 17 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Victor 4 N station.

When is the first frost in Fairmount, ND?

The median first fall frost near 58030 is October 3, giving a median frost-free growing season of 152 days.

When should I plant tomatoes in 58030?

Start tomato seeds indoors around Mar 9 – Mar 23 and set transplants outside around May 11 – May 25, one to three weeks after the median last frost.

How much rain and snow does 58030 get?

About 25.8 inches of precipitation a year and 49 inches of snowfall (NOAA 1991–2020 normals, Victor 4 N station).

How hot do summers get in Fairmount, ND?

The average high peaks at 82 °F in July, with about 8 days a year at 90 °F or more.

What kind of soil does 58030 have?

The USDA soil survey maps Antler at the center of ZIP 58030: clay loam, somewhat poorly drained, pH about 7.0 (neutral).

Did spring come early in Fairmount, ND in 2026?

Spring leaf-out near 58030 came on Apr 21 in 2026, about the same as the 1991–2020 average (Apr 20), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Fairmount, ND?

Long-day onions: the longest day near 58030 is 15 h 45 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).