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

Planting zone for 58220 — Cavalier, ND

ZIP code 58220 (Cavalier, Pembina County) is in USDA zone 4a: the coldest winter night averages −30 to −25 °F. The median last spring frost is May 12 and the first fall frost September 30.

Where ZIP 58220 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 12
First frostSep 30
2012 zone3b

Was 3b 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 4a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Cavalier, 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 Cavalier, ND

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMay 12median — 50% chance of a later frost
Safe for tender plantsMay 27only 10% chance of frost after
First fall frostSeptember 30median — 10% chance by Sep 17
Growing season139 daysfrost-free, median

A hard freeze (28 °F) usually ends around May 2 and returns around October 10.

From the NOAA station Cavalier 7nw, ND — 5 miles away, elevation 899 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 58220

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 31 – Apr 14
SpinachSow outdoors · Mar 31 – Apr 21
Broccoli, cabbageStart indoors · Mar 3 – Mar 17
Broccoli, cabbageTransplant · Apr 21 – May 5
Onion setsPlant outdoors · Apr 14 – Apr 28
PotatoesPlant outdoors · Apr 21 – May 5
LettuceSow outdoors · Apr 14 – Apr 28
Carrots, beetsSow outdoors · Apr 21 – May 5
TomatoesStart indoors · Mar 17 – Mar 31
TomatoesTransplant · May 19 – Jun 2
Peppers, eggplantStart indoors · Mar 3 – Mar 17
Peppers, eggplantTransplant · May 26 – Jun 9
BeansSow outdoors · May 19 – Jun 2
Sweet cornSow outdoors · May 19 – Jun 2
Cucumbers, squashSow outdoors · May 19 – Jun 2
Fall lettuce, spinachSow outdoors · Aug 5 – Aug 19
GarlicPlant cloves · Sep 16 – Oct 21
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 12) and first fall frost (Sep 30) 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 58220 came on May 6 — 9 days later than the 1991–2020 average (Apr 27).

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 Cavalier, ND.

Soil in Cavalier, ND

The soil mapped at the center of ZIP 58220 is Hamar — fine sandy loam, poorly drained.

TextureFine sandy loamdrains and warms fast; dries out and needs more feeding
pH7.0neutral; most vegetables like 6.0–7.0
DrainagePoorly drainedconsider raised beds
Organic matter3%moderate
Hydrologic groupA/Ddrains fast once dried out; wet otherwise
Farmland classNot prime farmlandUSDA classification

Map unit: Hamar fine sandy 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 58220; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Cavalier, ND

Summer high78 °Faverage high, July
Winter low−4 °Faverage low, January
Hot days4days a year at 90 °F or more
Freezing nights192nights a year at 32 °F or less
Growing degree days1,853base 50 °F — the season’s usable heat
Longest day16 h 10 mindaylight on June 21
Shortest day8 h 15 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation21.4 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 13 °F, low -4 °F 13°−4° JanFebruary: average high 18 °F, low -1 °F 18°−1° FebMarch: average high 31 °F, low 13 °F 31°13° MarApril: average high 49 °F, low 29 °F 49°29° AprMay: average high 65 °F, low 41 °F 65°41° MayJune: average high 74 °F, low 53 °F 74°53° JunJuly: average high 78 °F, low 57 °F 78°57° JulAugust: average high 77 °F, low 54 °F 77°54° AugSeptember: average high 68 °F, low 45 °F 68°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 3 °F 20°3° Dec

Precipitation by month inches

0″1″2″3″4″January: 0.42 in precipitation 0.4 JanFebruary: 0.31 in precipitation 0.3 FebMarch: 0.96 in precipitation 1.0 MarApril: 1.03 in precipitation 1.0 AprMay: 2.98 in precipitation 3.0 MayJune: 3.69 in precipitation 3.7 JunJuly: 3.69 in precipitation 3.7 JulAugust: 2.61 in precipitation 2.6 AugSeptember: 2.54 in precipitation 2.5 SepOctober: 1.72 in precipitation 1.7 OctNovember: 0.80 in precipitation 0.8 NovDecember: 0.64 in precipitation 0.6 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Cavalier 7nw, ND (5 mi away); precipitation: Cavalier 7.9 Wnw, ND (4 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.

582414a
Hensel, ND · 6 mi
582624a
Mountain, ND · 10 mi
582824a
Walhalla, ND · 11 mi
582364a
Glasston, ND · 12 mi
582224a
Crystal, ND · 13 mi
582654a
Neche, ND · 13 mi
582163b
Bathgate, ND · 15 mi
582384a
Hamilton, ND · 16 mi

North Dakota planting zones →

Questions about 58220

What planting zone is ZIP code 58220?

ZIP code 58220 (Cavalier, 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 Cavalier, ND?

The median last spring frost (32 °F) near 58220 is May 12; after May 27 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Cavalier 7nw station.

When is the first frost in Cavalier, ND?

The median first fall frost near 58220 is September 30, giving a median frost-free growing season of 139 days.

When should I plant tomatoes in 58220?

Start tomato seeds indoors around Mar 17 – Mar 31 and set transplants outside around May 19 – Jun 2, one to three weeks after the median last frost.

How much rain and snow does 58220 get?

About 21.4 inches of precipitation a year (NOAA 1991–2020 normals, Cavalier 7.9 Wnw station).

How hot do summers get in Cavalier, ND?

The average high peaks at 78 °F in July, with about 4 days a year at 90 °F or more.

What kind of soil does 58220 have?

The USDA soil survey maps Hamar at the center of ZIP 58220: fine sandy loam, poorly drained, pH about 7.0 (neutral).

Did spring come early in Cavalier, ND in 2026?

Spring leaf-out near 58220 came on May 6 in 2026, 9 days later than the 1991–2020 average (Apr 27), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Cavalier, ND?

Long-day onions: the longest day near 58220 is 16 h 10 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 58220 change?

Yes. The 2012 USDA map put 58220 in zone 3b; the 2023 map puts it in zone 4a. The newer map uses 1991–2020 data and more weather stations.