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

Planting zone for 55771 — Orr, MN

ZIP code 55771 (Orr, St. Louis County) is in USDA zone 3b: the coldest winter night averages −35 to −30 °F. The median last spring frost is June 2 and the first fall frost September 15.

Where ZIP 55771 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 frostJun 2

First frostSep 15

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 Orr, MN…

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 Orr, MN

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostJune 2median — 50% chance of a later frost

Safe for tender plantsJune 17only 10% chance of frost after

First fall frostSeptember 15median — 10% chance by Aug 29

Growing season102 daysfrost-free, median

A hard freeze (28 °F) usually ends around May 20 and returns around September 27.

From the NOAA station Orr 3e, MN — 8 miles away, elevation 1,316 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 55771

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Apr 21 – May 5

SpinachSow outdoors · Apr 21 – May 12

Broccoli, cabbageStart indoors · Mar 24 – Apr 7

Broccoli, cabbageTransplant · May 12 – May 26

Onion setsPlant outdoors · May 5 – May 19

PotatoesPlant outdoors · May 12 – May 26

LettuceSow outdoors · May 5 – May 19

Carrots, beetsSow outdoors · May 12 – May 26

TomatoesStart indoors · Apr 7 – Apr 21

TomatoesTransplant · Jun 9 – Jun 23

Peppers, eggplantStart indoors · Mar 24 – Apr 7

Peppers, eggplantTransplant · Jun 16 – Jun 30

BeansSow outdoors · Jun 9 – Jun 23

Sweet cornSow outdoors · Jun 9 – Jun 23

Cucumbers, squashSow outdoors · Jun 9 – Jun 23

Fall lettuce, spinachSow outdoors · Jul 21 – Aug 4

GarlicPlant cloves · Sep 1 – Oct 6

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Jun 2) and first fall frost (Sep 15) 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 55771 came on May 4 — 6 days later than the 1991–2020 average (Apr 28).

average
Apr 282026
May 4

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 Minnesota

287 plants native to the lower 48 states, recorded in Minnesota, and rated by the USDA to survive −35 °F or colder — the bottom of zone 3b. Each links to its USDA PLANTS profile.

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 Orr, MN.

Soil in Orr, MN

The soil mapped at the center of ZIP 55771 is Wahlsten — stony loam, moderately well drained.

TextureStony loama good balance for most vegetables

pH4.9strongly acidic; most vegetables like 6.0–7.0

DrainageModerately well drainednatural drainage class

Organic matter5%high

Hydrologic groupDwater soaks in very slowly

Farmland classNot prime farmlandUSDA classification

Map unit: Wahlsten, bouldery-Rock outcrop-Aquepts, rubbly, complex, 0 to 25 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 55771; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Orr, MN

Summer high75 °Faverage high, July

Winter low−8 °Faverage low, January

Hot days1days a year at 90 °F or more

Freezing nights215nights a year at 32 °F or less

Growing degree days1,270base 50 °F — the season’s usable heat

Longest day16 h 04 mindaylight on June 21

Shortest day8 h 21 mindaylight on December 21

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

Precipitation26 inper year, rain and melted snow

Average high and low, by month

Precipitation by month inches

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Orr 3e, MN (8 mi away); precipitation: Orr 3e, MN (8 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.

Kabetogama, MN · 23 mi

557253b

Crane Lake, MN · 24 mi

557033b

Angora, MN · 28 mi

557813b

Side Lake, MN · 31 mi

566493b

International Falls, MN · 31 mi

557903a

Tower, MN · 32 mi

Minnesota planting zones →

Questions about 55771

What planting zone is ZIP code 55771?

ZIP code 55771 (Orr, MN) 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 Orr, MN?

The median last spring frost (32 °F) near 55771 is June 2; after June 17 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Orr 3e station.

When is the first frost in Orr, MN?

The median first fall frost near 55771 is September 15, giving a median frost-free growing season of 102 days.

When should I plant tomatoes in 55771?

Start tomato seeds indoors around Apr 7 – Apr 21 and set transplants outside around Jun 9 – Jun 23, one to three weeks after the median last frost.

How much rain and snow does 55771 get?

About 26 inches of precipitation a year (NOAA 1991–2020 normals, Orr 3e station).

How hot do summers get in Orr, MN?

The average high peaks at 75 °F in July, with about 1 days a year at 90 °F or more.

What kind of soil does 55771 have?

The USDA soil survey maps Wahlsten at the center of ZIP 55771: stony loam, moderately well drained, pH about 4.9 (strongly acidic).

Did spring come early in Orr, MN in 2026?

Spring leaf-out near 55771 came on May 4 in 2026, 6 days later than the 1991–2020 average (Apr 28), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Orr, MN?

Long-day onions: the longest day near 55771 is 16 h 04 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 55771 change?

Yes. The 2012 USDA map put 55771 in zone 3a; the 2023 map puts it in zone 3b. The newer map uses 1991–2020 data and more weather stations.