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

Planting zone for 55377 — Santiago, MN

ZIP code 55377 (Santiago, Sherburne County) is in USDA zone 4b: the coldest winter night averages −25 to −20 °F. The median last spring frost is May 7 and the first fall frost September 28.

Where ZIP 55377 is

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.

Zone4b−25 to −20 °F
Coldest night−31.7 to −28.9 °C
Last frostMay 7
First frostSep 28
2012 zone4a

Was 4a 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 4b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Santiago, 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 Santiago, MN

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMay 7median — 50% chance of a later frost
Safe for tender plantsMay 22only 10% chance of frost after
First fall frostSeptember 28median — 10% chance by Sep 15
Growing season144 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 28 and returns around October 8.

From the NOAA station Santiago 3 E, MN — 3 miles away, elevation 1,011 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 55377

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 26 – Apr 9
SpinachSow outdoors · Mar 26 – Apr 16
Broccoli, cabbageStart indoors · Feb 26 – Mar 12
Broccoli, cabbageTransplant · Apr 16 – Apr 30
Onion setsPlant outdoors · Apr 9 – Apr 23
PotatoesPlant outdoors · Apr 16 – Apr 30
LettuceSow outdoors · Apr 9 – Apr 23
Carrots, beetsSow outdoors · Apr 16 – Apr 30
TomatoesStart indoors · Mar 12 – Mar 26
TomatoesTransplant · May 14 – May 28
Peppers, eggplantStart indoors · Feb 26 – Mar 12
Peppers, eggplantTransplant · May 21 – Jun 4
BeansSow outdoors · May 14 – May 28
Sweet cornSow outdoors · May 14 – May 28
Cucumbers, squashSow outdoors · May 14 – May 28
Fall lettuce, spinachSow outdoors · Aug 3 – Aug 17
GarlicPlant cloves · Sep 14 – Oct 19
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 7) and first fall frost (Sep 28) 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 55377 came on Apr 15 — 4 days earlier than the 1991–2020 average (Apr 19).

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 4b in Minnesota

497 plants native to the lower 48 states, recorded in Minnesota, and rated by the USDA to survive −25 °F or colder — the bottom of zone 4b. Each links to its USDA PLANTS profile.

Trees 47

American basswood100 ft · blooms late spring · low shade tolerance · to −46 °FAmerican beech80 ft · blooms mid spring · low shade tolerance · to −44 °FAmerican elm120 ft · blooms early spring · medium shade tolerance · to −46 °Farborvitae50 ft · blooms mid spring · medium shade tolerance · to −33 °Fbalsam fir60 ft · blooms mid summer · low shade tolerance · to −43 °Fbalsam poplar80 ft · blooms late spring · high shade tolerance · to −79 °F

Shrubs 88

alderleaf buckthorn3 ft · blooms late spring · low shade tolerance · to −33 °FAllegheny serviceberry35 ft · blooms early spring · low shade tolerance · to −38 °Falternateleaf dogwood25 ft · blooms mid spring · low shade tolerance · to −47 °FAmerican black currant3 ft · blooms early spring · to −46 °FAmerican hazelnut10 ft · blooms spring · medium shade tolerance · to −33 °FAmerican hornbeam30 ft · blooms mid spring · low shade tolerance · to −34 °F

Wildflowers & perennials 190

alkali buttercup1 ft · blooms late spring · low shade tolerance · to −38 °Falpine bistort1 ft · blooms mid spring · high shade tolerance · to −38 °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 lotus3 ft · blooms mid summer · high shade tolerance · to −36 °F

Grasses 156

alkali cordgrass3 ft · blooms late summer · high shade tolerance · to −38 °FAmerican beachgrass2.5 ft · blooms spring · high shade tolerance · to −28 °Farctic brome3 ft · blooms early summer · low shade tolerance · to −33 °Fawlfruit sedge4 ft · blooms mid spring · low shade tolerance · to −38 °Fbasin wildrye5 ft · blooms early spring · high shade tolerance · to −43 °Fbeaked sedge4 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 °FVirginia creeper1 ft · blooms late spring · medium shade tolerance · to −28 °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 Santiago, MN.

Soil in Santiago, MN

The soil mapped at the center of ZIP 55377 is Bushville — fine sand, somewhat poorly drained.

TextureFine sanddrains and warms fast; dries out and needs more feeding
pH6.0slightly acidic; most vegetables like 6.0–7.0
DrainageSomewhat poorly drainedconsider raised beds
Organic matter0.75%low — add compost
Hydrologic groupC/Dslow when drained; wet otherwise
Farmland classFarmland of statewide importanceUSDA classification

Map unit: Bushville fine sand, 2 to 6 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 55377; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Santiago, MN

Summer high81 °Faverage high, July
Winter low4 °Faverage low, January
Hot days7days a year at 90 °F or more
Freezing nights170nights a year at 32 °F or less
Growing degree days2,365base 50 °F — the season’s usable heat
Longest day15 h 41 mindaylight on June 21
Shortest day8 h 42 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation30.7 inper year, rain and melted snow
Snowfall49 inper year; 103 days with snow on the ground

Average high and low, by month

−10°0°10°20°30°40°50°60°70°80°90°32 °FJanuary: average high 22 °F, low 4 °F 22°4° JanFebruary: average high 27 °F, low 8 °F 27°8° FebMarch: average high 40 °F, low 21 °F 40°21° MarApril: average high 56 °F, low 33 °F 56°33° AprMay: average high 69 °F, low 45 °F 69°45° MayJune: average high 77 °F, low 55 °F 77°55° JunJuly: average high 81 °F, low 59 °F 81°59° JulAugust: average high 79 °F, low 57 °F 79°57° AugSeptember: average high 72 °F, low 49 °F 72°49° SepOctober: average high 57 °F, low 36 °F 57°36° OctNovember: average high 40 °F, low 24 °F 40°24° NovDecember: average high 27 °F, low 11 °F 27°11° Dec

Precipitation by month inches · ❄ = snowfall

0″1″2″3″4″5″January: 0.77 in precipitation, 9.8 in snowfall 0.8❄10 JanFebruary: 0.90 in precipitation, 9.5 in snowfall 0.9❄10 FebMarch: 1.72 in precipitation, 8.7 in snowfall 1.7❄9 MarApril: 2.83 in precipitation, 3.5 in snowfall 2.8❄4 AprMay: 3.90 in precipitation, 0.1 in snowfall 3.9 MayJune: 4.23 in precipitation 4.2 JunJuly: 3.99 in precipitation 4.0 JulAugust: 4.06 in precipitation 4.1 AugSeptember: 2.90 in precipitation 2.9 SepOctober: 2.72 in precipitation, 0.8 in snowfall 2.7❄1 OctNovember: 1.56 in precipitation, 6.5 in snowfall 1.6❄7 NovDecember: 1.11 in precipitation, 10.5 in snowfall 1.1❄11 Dec

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

553194b
Clear Lake, MN · 8 mi
553084b
Becker, MN · 9 mi
563574b
Oak Park, MN · 10 mi
553714b
Princeton, MN · 11 mi
563044b
Saint Cloud, MN · 12 mi
553094b
Big Lake, MN · 12 mi
553984b
Zimmerman, MN · 12 mi
563294a
Foley, MN · 13 mi

Minnesota planting zones →

Questions about 55377

What planting zone is ZIP code 55377?

ZIP code 55377 (Santiago, MN) is in USDA hardiness zone 4b on the 2023 map: the coldest night of an average winter reaches −25 to −20 °F (−31.7 to −28.9 °C).

When is the last frost in Santiago, MN?

The median last spring frost (32 °F) near 55377 is May 7; after May 22 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Santiago 3 E station.

When is the first frost in Santiago, MN?

The median first fall frost near 55377 is September 28, giving a median frost-free growing season of 144 days.

When should I plant tomatoes in 55377?

Start tomato seeds indoors around Mar 12 – Mar 26 and set transplants outside around May 14 – May 28, one to three weeks after the median last frost.

How much rain and snow does 55377 get?

About 30.7 inches of precipitation a year and 49 inches of snowfall (NOAA 1991–2020 normals, Santiago 3 E station).

How hot do summers get in Santiago, MN?

The average high peaks at 81 °F in July, with about 7 days a year at 90 °F or more.

What kind of soil does 55377 have?

The USDA soil survey maps Bushville at the center of ZIP 55377: fine sand, somewhat poorly drained, pH about 6.0 (slightly acidic).

Did spring come early in Santiago, MN in 2026?

Spring leaf-out near 55377 came on Apr 15 in 2026, 4 days earlier than the 1991–2020 average (Apr 19), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Santiago, MN?

Long-day onions: the longest day near 55377 is 15 h 41 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 55377 change?

Yes. The 2012 USDA map put 55377 in zone 4a; the 2023 map puts it in zone 4b. The newer map uses 1991–2020 data and more weather stations.