Data: 2023 USDA zones (PRISM/OSU) · NOAA 1991–2020 normals · updated Oct 29, 2026

Planting zone for 58770 — Parshall, ND

ZIP code 58770 (Parshall, Mountrail County) is in USDA zone 4a: the coldest winter night averages −30 to −25 °F. The median last spring frost is May 20 and the first fall frost September 20.

Where ZIP 58770 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 20

First frostSep 20

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 Parshall, 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 Parshall, ND

JanFebMarAprMayJunJulAugSepOctNovDec

Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free

Last spring frostMay 20median — 50% chance of a later frost

Safe for tender plantsJune 2only 10% chance of frost after

First fall frostSeptember 20median — 10% chance by Sep 5

Growing season121 daysfrost-free, median

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

From the NOAA station Keene 3s, ND — 35 miles away, elevation 2,471 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 58770

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Apr 8 – Apr 22

SpinachSow outdoors · Apr 8 – Apr 29

Broccoli, cabbageStart indoors · Mar 11 – Mar 25

Broccoli, cabbageTransplant · Apr 29 – May 13

Onion setsPlant outdoors · Apr 22 – May 6

PotatoesPlant outdoors · Apr 29 – May 13

LettuceSow outdoors · Apr 22 – May 6

Carrots, beetsSow outdoors · Apr 29 – May 13

TomatoesStart indoors · Mar 25 – Apr 8

TomatoesTransplant · May 27 – Jun 10

Peppers, eggplantStart indoors · Mar 11 – Mar 25

Peppers, eggplantTransplant · Jun 3 – Jun 17

BeansSow outdoors · May 27 – Jun 10

Sweet cornSow outdoors · May 27 – Jun 10

Cucumbers, squashSow outdoors · May 27 – Jun 10

Fall lettuce, spinachSow outdoors · Jul 26 – Aug 9

GarlicPlant cloves · Sep 6 – Oct 11

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 20) and first fall frost (Sep 20) 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 58770 came on Apr 21 — about the same time as the 1991–2020 average (Apr 22).

average
Apr 222026
Apr 21

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).

Soil in Parshall, ND

The soil mapped at the center of ZIP 58770 is Williams — loam, well drained.

TextureLoama good balance for most vegetables

pH7.2neutral; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter4%moderate

Hydrologic groupBwater soaks in moderately

Farmland classFarmland of statewide importanceUSDA classification

Map unit: Williams-Bowbells 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 58770; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Parshall, ND

Summer high83 °Faverage high, July

Winter low4 °Faverage low, January

Hot days20days a year at 90 °F or more

Freezing nights185nights a year at 32 °F or less

Growing degree days2,176base 50 °F — the season’s usable heat

Longest day16 h 02 mindaylight on June 21

Shortest day8 h 23 mindaylight on December 21

Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)

Precipitation16.8 inper year, rain and melted snow

Snowfall50 inper year; 117 days with snow on the ground

Average high and low, by month

Precipitation by month inches · ❄ = snowfall

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Keene 3s, ND (35 mi away); precipitation: Tagus, ND (35 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 4a.

North Dakota planting zones →

Questions about 58770

What planting zone is ZIP code 58770?

ZIP code 58770 (Parshall, 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 Parshall, ND?

The median last spring frost (32 °F) near 58770 is May 20; after June 2 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Keene 3s station.

When is the first frost in Parshall, ND?

The median first fall frost near 58770 is September 20, giving a median frost-free growing season of 121 days.

When should I plant tomatoes in 58770?

Start tomato seeds indoors around Mar 25 – Apr 8 and set transplants outside around May 27 – Jun 10, one to three weeks after the median last frost.

How much rain and snow does 58770 get?

About 16.8 inches of precipitation a year and 50 inches of snowfall (NOAA 1991–2020 normals, Tagus station).

How hot do summers get in Parshall, ND?

The average high peaks at 83 °F in July, with about 20 days a year at 90 °F or more.

What kind of soil does 58770 have?

The USDA soil survey maps Williams at the center of ZIP 58770: loam, well drained, pH about 7.2 (neutral).

Did spring come early in Parshall, ND in 2026?

Spring leaf-out near 58770 came on Apr 21 in 2026, about the same as the 1991–2020 average (Apr 22), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Parshall, ND?

Long-day onions: the longest day near 58770 is 16 h 02 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).