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

Planting zone for 58783 — Souris, ND

ZIP code 58783 (Souris, Bottineau County) is in USDA zone 3b: the coldest winter night averages −35 to −30 °F. The median last spring frost is May 14 and the first fall frost September 25.

Where ZIP 58783 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 14
First frostSep 25
2012 zone3a

Was 3a 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 3b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Souris, 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 Souris, ND

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMay 14median — 50% chance of a later frost
Safe for tender plantsMay 26only 10% chance of frost after
First fall frostSeptember 25median — 10% chance by Sep 13
Growing season133 daysfrost-free, median

A hard freeze (28 °F) usually ends around May 5 and returns around October 3.

From the NOAA station Westhope, ND — 12 miles away, elevation 1,503 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 58783

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Apr 2 – Apr 16
SpinachSow outdoors · Apr 2 – Apr 23
Broccoli, cabbageStart indoors · Mar 5 – Mar 19
Broccoli, cabbageTransplant · Apr 23 – May 7
Onion setsPlant outdoors · Apr 16 – Apr 30
PotatoesPlant outdoors · Apr 23 – May 7
LettuceSow outdoors · Apr 16 – Apr 30
Carrots, beetsSow outdoors · Apr 23 – May 7
TomatoesStart indoors · Mar 19 – Apr 2
TomatoesTransplant · May 21 – Jun 4
Peppers, eggplantStart indoors · Mar 5 – Mar 19
Peppers, eggplantTransplant · May 28 – Jun 11
BeansSow outdoors · May 21 – Jun 4
Sweet cornSow outdoors · May 21 – Jun 4
Cucumbers, squashSow outdoors · May 21 – Jun 4
Fall lettuce, spinachSow outdoors · Jul 31 – Aug 14
GarlicPlant cloves · Sep 11 – Oct 16
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 14) and first fall frost (Sep 25) 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 58783 came on Apr 28 — 3 days later than the 1991–2020 average (Apr 25).

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 Souris, ND.

Soil in Souris, ND

The soil mapped at the center of ZIP 58783 is Southam — silty clay loam, very poorly drained.

TextureSilty clay loamholds water and nutrients; slow to drain and warm up
pH7.2neutral; most vegetables like 6.0–7.0
DrainageVery poorly drainedconsider raised beds
Organic matter10%high
Hydrologic groupC/Dslow when drained; wet otherwise
Farmland classNot prime farmlandUSDA classification

Map unit: Southam silty clay loam, 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 58783; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Souris, ND

Summer high82 °Faverage high, July
Winter low−2 °Faverage low, January
Hot days12days a year at 90 °F or more
Freezing nights190nights a year at 32 °F or less
Growing degree days2,170base 50 °F — the season’s usable heat
Longest day16 h 11 mindaylight on June 21
Shortest day8 h 14 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation18.8 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 16 °F, low -2 °F 16°−2° JanFebruary: average high 21 °F, low 2 °F 21°2° FebMarch: average high 35 °F, low 15 °F 35°15° MarApril: average high 55 °F, low 29 °F 55°29° AprMay: average high 68 °F, low 42 °F 68°42° MayJune: average high 77 °F, low 53 °F 77°53° JunJuly: average high 82 °F, low 57 °F 82°57° JulAugust: average high 82 °F, low 54 °F 82°54° AugSeptember: average high 73 °F, low 45 °F 73°45° SepOctober: average high 55 °F, low 32 °F 55°32° OctNovember: average high 35 °F, low 17 °F 35°17° NovDecember: average high 21 °F, low 4 °F 21°4° Dec

Precipitation by month inches

0″1″2″3″4″January: 0.54 in precipitation 0.5 JanFebruary: 0.50 in precipitation 0.5 FebMarch: 0.87 in precipitation 0.9 MarApril: 1.12 in precipitation 1.1 AprMay: 2.63 in precipitation 2.6 MayJune: 3.83 in precipitation 3.8 JunJuly: 2.64 in precipitation 2.6 JulAugust: 2.37 in precipitation 2.4 AugSeptember: 1.43 in precipitation 1.4 SepOctober: 1.47 in precipitation 1.5 OctNovember: 0.72 in precipitation 0.7 NovDecember: 0.63 in precipitation 0.6 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Westhope, ND (12 mi away); precipitation: Westhope, ND (12 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 3b.

587933b
Westhope, ND · 13 mi
587483b
Kramer, ND · 16 mi
587623b
Newburg, ND · 16 mi
583183b
Bottineau, ND · 17 mi
587603b
Maxbass, ND · 21 mi
587893b
Upham, ND · 23 mi
587113b
Antler, ND · 23 mi
587133b
Bantry, ND · 26 mi

North Dakota planting zones →

Questions about 58783

What planting zone is ZIP code 58783?

ZIP code 58783 (Souris, 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 Souris, ND?

The median last spring frost (32 °F) near 58783 is May 14; after May 26 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Westhope station.

When is the first frost in Souris, ND?

The median first fall frost near 58783 is September 25, giving a median frost-free growing season of 133 days.

When should I plant tomatoes in 58783?

Start tomato seeds indoors around Mar 19 – Apr 2 and set transplants outside around May 21 – Jun 4, one to three weeks after the median last frost.

How much rain and snow does 58783 get?

About 18.8 inches of precipitation a year (NOAA 1991–2020 normals, Westhope station).

How hot do summers get in Souris, ND?

The average high peaks at 82 °F in July, with about 12 days a year at 90 °F or more.

What kind of soil does 58783 have?

The USDA soil survey maps Southam at the center of ZIP 58783: silty clay loam, very poorly drained, pH about 7.2 (neutral).

Did spring come early in Souris, ND in 2026?

Spring leaf-out near 58783 came on Apr 28 in 2026, 3 days later than the 1991–2020 average (Apr 25), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Souris, ND?

Long-day onions: the longest day near 58783 is 16 h 11 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 58783 change?

Yes. The 2012 USDA map put 58783 in zone 3a; the 2023 map puts it in zone 3b. The newer map uses 1991–2020 data and more weather stations.