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

Planting zone for Sheboygan, WI

Sheboygan, WI is in USDA zones 5b to 6a across its 3 ZIP codes. The median last spring frost is May 2 and the first fall frost October 21.

Sheboygan on the zone map

Outlined: its 2 ZIP code areas · 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.

Zones5b–6a−15 to −5 °F

ZIP codes3

Last frostMay 2

First frostOct 21

Growing season169 days

5b 1 ZIP 6a 2 ZIPs

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Sheboygan, WI…

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 Sheboygan, WI

JanFebMarAprMayJunJulAugSepOctNovDec

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

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

Safe for tender plantsMay 19only 10% chance of frost after

First fall frostOctober 21median — 10% chance by Oct 3

Growing season169 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 18 and returns around November 2.

From the NOAA station Sheboygan Wwtp, WI, elevation 604 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 Sheboygan

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Mar 21 – Apr 4

SpinachSow outdoors · Mar 21 – Apr 11

Broccoli, cabbageStart indoors · Feb 21 – Mar 7

Broccoli, cabbageTransplant · Apr 11 – Apr 25

Onion setsPlant outdoors · Apr 4 – Apr 18

PotatoesPlant outdoors · Apr 11 – Apr 25

LettuceSow outdoors · Apr 4 – Apr 18

Carrots, beetsSow outdoors · Apr 11 – Apr 25

TomatoesStart indoors · Mar 7 – Mar 21

TomatoesTransplant · May 9 – May 23

Peppers, eggplantStart indoors · Feb 21 – Mar 7

Peppers, eggplantTransplant · May 16 – May 30

BeansSow outdoors · May 9 – May 23

Sweet cornSow outdoors · May 9 – May 23

Cucumbers, squashSow outdoors · May 9 – May 23

Fall lettuce, spinachSow outdoors · Aug 26 – Sep 9

GarlicPlant cloves · Oct 7 – Nov 11

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 2) and first fall frost (Oct 21) 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 53081 came on Apr 11 — 7 days earlier than the 1991–2020 average (Apr 18).

average
Apr 182026
Apr 11

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 5b in Wisconsin

518 plants native to the lower 48 states, recorded in Wisconsin, and rated by the USDA to survive −15 °F or colder — the bottom of zone 5b. 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 Sheboygan, WI.

Soil in Sheboygan, WI

The soil mapped at the center of ZIP 53081 is Bellevue, well drained.

DrainageWell drainednatural drainage class

Farmland classPrime farmland if protected from flooding or not frequently flooded during the growing seasonUSDA classification

Map unit: Alluvial land.

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 53081; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Sheboygan, WI

Summer high77 °Faverage high, July

Winter low13 °Faverage low, January

Hot days2days a year at 90 °F or more

Freezing nights144nights a year at 32 °F or less

Growing degree days2,040base 50 °F — the season’s usable heat

Longest day15 h 27 mindaylight on June 21

Shortest day8 h 55 mindaylight on December 21

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

Precipitation34.3 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: Sheboygan Wwtp, WI (within 1 mile); precipitation: Sheboygan Wwtp, WI (within 1 mile). Daylight is calculated from latitude.

ZIP codes in Sheboygan

Wisconsin planting zones →

Questions about Sheboygan

What planting zone is Sheboygan, WI?

Sheboygan, WI is in USDA hardiness zones 5b to 6a on the 2023 map (5b: −15 to −10 °F; 6a: −10 to −5 °F).

When is the last frost in Sheboygan, WI?

The median last spring frost is May 2 and the median first fall frost is October 21 (NOAA 1991–2020 normals, Sheboygan Wwtp station).

When can I plant a garden in Sheboygan, WI?

Cool-season crops like peas and spinach go in around Mar 21 – Apr 11; tomatoes, peppers, beans and squash after about May 9, once frost risk has passed.

What kind of onions grow in Sheboygan, WI?

Long-day onions: the longest day is 15 h 27 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

How much rain and snow does Sheboygan, WI get?

About 34.3 inches of precipitation a year (NOAA 1991–2020 normals).