Data: 2023 USDA zones (PRISM/OSU) · NOAA 1991–2020 normals · updated Oct 30, 2026

Planting zone for 54209 — Egg Harbor, WI

ZIP code 54209 (Egg Harbor, Door County) is in USDA zone 5b: the coldest winter night averages −15 to −10 °F. The median last spring frost is May 8 and the first fall frost October 13.

Where ZIP 54209 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.

Zone5b−15 to −10 °F

Coldest night−26.1 to −23.3 °C

Last frostMay 8

First frostOct 13

2012 zone5b

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 5b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Egg Harbor, 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 Egg Harbor, WI

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostMay 8median — 50% chance of a later frost

Safe for tender plantsMay 21only 10% chance of frost after

First fall frostOctober 13median — 10% chance by Sep 28

Growing season157 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 26 and returns around October 28.

From the NOAA station Sturgeon Bay Exp Farm, WI — 10 miles away, elevation 699 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 54209

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Mar 27 – Apr 10

SpinachSow outdoors · Mar 27 – Apr 17

Broccoli, cabbageStart indoors · Feb 27 – Mar 13

Broccoli, cabbageTransplant · Apr 17 – May 1

Onion setsPlant outdoors · Apr 10 – Apr 24

PotatoesPlant outdoors · Apr 17 – May 1

LettuceSow outdoors · Apr 10 – Apr 24

Carrots, beetsSow outdoors · Apr 17 – May 1

TomatoesStart indoors · Mar 13 – Mar 27

TomatoesTransplant · May 15 – May 29

Peppers, eggplantStart indoors · Feb 27 – Mar 13

Peppers, eggplantTransplant · May 22 – Jun 5

BeansSow outdoors · May 15 – May 29

Sweet cornSow outdoors · May 15 – May 29

Cucumbers, squashSow outdoors · May 15 – May 29

Fall lettuce, spinachSow outdoors · Aug 18 – Sep 1

GarlicPlant cloves · Sep 29 – Nov 3

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 8) and first fall frost (Oct 13) 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 54209 came on Apr 22 — about the same time as the 1991–2020 average (Apr 23).

average
Apr 232026
Apr 22

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 Egg Harbor, WI.

Soil in Egg Harbor, WI

The soil mapped at the center of ZIP 54209 is Longrie — loam, well drained.

TextureLoama good balance for most vegetables

pH6.5neutral; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter1.5%low — add compost

Hydrologic groupCwater soaks in slowly

Farmland classprime farmlandUSDA classification

Map unit: Longrie loam, 0 to 2 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 54209; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Egg Harbor, WI

Summer high78 °Faverage high, July

Winter low10 °Faverage low, January

Hot days2days a year at 90 °F or more

Freezing nights152nights a year at 32 °F or less

Growing degree days2,030base 50 °F — the season’s usable heat

Longest day15 h 37 mindaylight on June 21

Shortest day8 h 46 mindaylight on December 21

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

Precipitation32.9 inper year, rain and melted snow

Snowfall57 inper year; 90 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: Sturgeon Bay Exp Farm, WI (10 mi away); precipitation: Sturgeon Bay Exp Farm, WI (10 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 5b.

542125b

Fish Creek, WI · 7 mi

542025b

Baileys Harbor, WI · 8 mi

542115b

Ephraim, WI · 11 mi

542355b

Sturgeon Bay, WI · 13 mi

542345b

Sister Bay, WI · 14 mi

542105b

Ellison Bay, WI · 19 mi

498585b

Menominee, MI · 20 mi

541435b

Marinette, WI · 21 mi

Wisconsin planting zones →

Questions about 54209

What planting zone is ZIP code 54209?

ZIP code 54209 (Egg Harbor, WI) is in USDA hardiness zone 5b on the 2023 map: the coldest night of an average winter reaches −15 to −10 °F (−26.1 to −23.3 °C).

When is the last frost in Egg Harbor, WI?

The median last spring frost (32 °F) near 54209 is May 8; after May 21 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Sturgeon Bay Exp Farm station.

When is the first frost in Egg Harbor, WI?

The median first fall frost near 54209 is October 13, giving a median frost-free growing season of 157 days.

When should I plant tomatoes in 54209?

Start tomato seeds indoors around Mar 13 – Mar 27 and set transplants outside around May 15 – May 29, one to three weeks after the median last frost.

How much rain and snow does 54209 get?

About 32.9 inches of precipitation a year and 57 inches of snowfall (NOAA 1991–2020 normals, Sturgeon Bay Exp Farm station).

How hot do summers get in Egg Harbor, WI?

The average high peaks at 78 °F in July, with about 2 days a year at 90 °F or more.

What kind of soil does 54209 have?

The USDA soil survey maps Longrie at the center of ZIP 54209: loam, well drained, pH about 6.5 (neutral).

Did spring come early in Egg Harbor, WI in 2026?

Spring leaf-out near 54209 came on Apr 22 in 2026, about the same as the 1991–2020 average (Apr 23), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Egg Harbor, WI?

Long-day onions: the longest day near 54209 is 15 h 37 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).