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

Planting zone for 55772 — Nett Lake, MN

ZIP code 55772 (Nett Lake, 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 55772 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 Nett Lake, 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 Nett Lake, 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 — 16 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 55772

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 55772 came on May 4 — 6 days later than the 1991–2020 average (Apr 28).

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 Nett Lake, MN

The soil mapped at the center of ZIP 55772 is Eveleth — stony loam, well drained.

TextureStony loama good balance for most vegetables
pH4.9strongly acidic; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter5%high
Hydrologic groupCwater soaks in slowly
Farmland classNot prime farmlandUSDA classification

Map unit: Eveleth-Eaglesnest-Conic complex, 3 to 18 percent slopes, bouldery, very rocky.

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 55772; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Nett Lake, 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

−20°−10°0°10°20°30°40°50°60°70°80°90°32 °FJanuary: average high 15 °F, low -8 °F 15°−8° JanFebruary: average high 21 °F, low -6 °F 21°−6° FebMarch: average high 34 °F, low 8 °F 34°8° MarApril: average high 48 °F, low 23 °F 48°23° AprMay: average high 61 °F, low 35 °F 61°35° MayJune: average high 71 °F, low 46 °F 71°46° JunJuly: average high 75 °F, low 51 °F 75°51° JulAugust: average high 74 °F, low 48 °F 74°48° AugSeptember: average high 64 °F, low 41 °F 64°41° SepOctober: average high 50 °F, low 31 °F 50°31° OctNovember: average high 33 °F, low 17 °F 33°17° NovDecember: average high 21 °F, low 2 °F 21°2° Dec

Precipitation by month inches

0″1″2″3″4″5″January: 0.90 in precipitation 0.9 JanFebruary: 0.65 in precipitation 0.7 FebMarch: 0.88 in precipitation 0.9 MarApril: 1.72 in precipitation 1.7 AprMay: 2.73 in precipitation 2.7 MayJune: 4.16 in precipitation 4.2 JunJuly: 4.13 in precipitation 4.1 JulAugust: 3.06 in precipitation 3.1 AugSeptember: 2.97 in precipitation 3.0 SepOctober: 2.33 in precipitation 2.3 OctNovember: 1.50 in precipitation 1.5 NovDecember: 1.00 in precipitation 1.0 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Orr 3e, MN (16 mi away); precipitation: Orr 3e, MN (16 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 3b.

557713b
Orr, MN · 9 mi
566693b
Kabetogama, MN · 19 mi
557233b
Cook, MN · 22 mi
566393b
Effie, MN · 24 mi
566533b
Littlefork, MN · 25 mi
566493b
International Falls, MN · 29 mi
557813b
Side Lake, MN · 30 mi
557033b
Angora, MN · 31 mi

Minnesota planting zones →

Questions about 55772

What planting zone is ZIP code 55772?

ZIP code 55772 (Nett Lake, 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 Nett Lake, MN?

The median last spring frost (32 °F) near 55772 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 Nett Lake, MN?

The median first fall frost near 55772 is September 15, giving a median frost-free growing season of 102 days.

When should I plant tomatoes in 55772?

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 55772 get?

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

How hot do summers get in Nett Lake, 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 55772 have?

The USDA soil survey maps Eveleth at the center of ZIP 55772: stony loam, well drained, pH about 4.9 (strongly acidic).

Did spring come early in Nett Lake, MN in 2026?

Spring leaf-out near 55772 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 Nett Lake, MN?

Long-day onions: the longest day near 55772 is 16 h 04 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 55772 change?

Yes. The 2012 USDA map put 55772 in zone 3a; the 2023 map puts it in zone 3b. The newer map uses 1991–2020 data and more weather stations.