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

Planting zone for 54313 — Green Bay, WI

ZIP code 54313 (Green Bay, Brown County) is in USDA zone 5b: the coldest winter night averages −15 to −10 °F. The median last spring frost is May 7 and the first fall frost October 9.

Where ZIP 54313 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 7
First frostOct 9
2012 zone5a

Was 5a 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 5b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Green Bay, 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 Green Bay, WI

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 frostOctober 9median — 10% chance by Sep 23
Growing season154 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 27 and returns around October 25.

From the NOAA station Green Bay Botanical, WI — 4 miles away, elevation 696 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 54313

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 14 – Aug 28
GarlicPlant cloves · Sep 25 – Oct 30
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 7) and first fall frost (Oct 9) 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 54313 came on Apr 15 — 3 days earlier than the 1991–2020 average (Apr 18).

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.

Trees 49

American basswood100 ft · blooms late spring · low shade tolerance · to −46 °FAmerican beech80 ft · blooms mid spring · low shade tolerance · to −44 °FAmerican chestnut115 ft · blooms early summer · high shade tolerance · to −33 °FAmerican elm120 ft · blooms early spring · medium shade tolerance · to −46 °FAmerican sycamore100 ft · blooms spring · medium shade tolerance · to −34 °Farborvitae50 ft · blooms mid spring · medium shade tolerance · to −33 °F

Shrubs 93

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 197

alkali buttercup1 ft · blooms late spring · low 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 °FAmerican pokeweed7 ft · blooms mid summer · low shade tolerance · to −33 °F

Grasses 159

American 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 °Fbeaked sedge4 ft · blooms late spring · low shade tolerance · to −38 °Fbeaked spikerush3 ft · blooms late spring · high shade tolerance · to −28 °FBebb's sedge3 ft · blooms late spring · low shade tolerance · to −38 °F

Vines 5

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 °Fsummer grape30 ft · blooms late spring · low shade tolerance · to −23 °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 Green Bay, WI.

Soil in Green Bay, WI

The soil mapped at the center of ZIP 54313 is Sisson — fine sandy loam, well drained.

TextureFine sandy loamdrains and warms fast; dries out and needs more feeding
pH6.7neutral; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter1.5%low — add compost
Hydrologic groupBwater soaks in moderately
Farmland classFarmland of statewide importanceUSDA classification

Map unit: Sisson fine sandy loam, 6 to 12 percent slopes, eroded.

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 54313; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Green Bay, WI

Summer high80 °Faverage high, July
Winter low9 °Faverage low, January
Hot days6days a year at 90 °F or more
Freezing nights159nights a year at 32 °F or less
Growing degree days2,279base 50 °F — the season’s usable heat
Longest day15 h 34 mindaylight on June 21
Shortest day8 h 49 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation32.4 inper year, rain and melted snow

Average high and low, by month

0°10°20°30°40°50°60°70°80°90°32 °FJanuary: average high 25 °F, low 9 °F 25°9° JanFebruary: average high 29 °F, low 11 °F 29°11° FebMarch: average high 40 °F, low 21 °F 40°21° MarApril: average high 54 °F, low 33 °F 54°33° AprMay: average high 67 °F, low 44 °F 67°44° MayJune: average high 75 °F, low 55 °F 75°55° JunJuly: average high 80 °F, low 59 °F 80°59° JulAugust: average high 78 °F, low 57 °F 78°57° AugSeptember: average high 71 °F, low 49 °F 71°49° SepOctober: average high 58 °F, low 39 °F 58°39° OctNovember: average high 44 °F, low 27 °F 44°27° NovDecember: average high 31 °F, low 17 °F 31°17° Dec

Precipitation by month inches

0″1″2″3″4″5″January: 1.32 in precipitation 1.3 JanFebruary: 1.10 in precipitation 1.1 FebMarch: 1.87 in precipitation 1.9 MarApril: 3.13 in precipitation 3.1 AprMay: 3.57 in precipitation 3.6 MayJune: 4.22 in precipitation 4.2 JunJuly: 3.74 in precipitation 3.7 JulAugust: 3.44 in precipitation 3.4 AugSeptember: 3.39 in precipitation 3.4 SepOctober: 2.82 in precipitation 2.8 OctNovember: 2.03 in precipitation 2.0 NovDecember: 1.76 in precipitation 1.8 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Green Bay Botanical, WI (4 mi away); precipitation: Green Bay Botanical, WI (4 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 5b.

543035b
Green Bay, WI · 4 mi
541555b
Oneida, WI · 6 mi
541735b
Suamico, WI · 6 mi
543065b
Green Bay, WI · 6 mi
543085b
Green Bay, WI · 6 mi
543045b
Green Bay, WI · 7 mi
543015b
Green Bay, WI · 9 mi
543025b
Green Bay, WI · 9 mi

All 12 ZIP codes in Green Bay → · Wisconsin planting zones →

Questions about 54313

What planting zone is ZIP code 54313?

ZIP code 54313 (Green Bay, 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 Green Bay, WI?

The median last spring frost (32 °F) near 54313 is May 7; after May 22 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Green Bay Botanical station.

When is the first frost in Green Bay, WI?

The median first fall frost near 54313 is October 9, giving a median frost-free growing season of 154 days.

When should I plant tomatoes in 54313?

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 54313 get?

About 32.4 inches of precipitation a year (NOAA 1991–2020 normals, Green Bay Botanical station).

How hot do summers get in Green Bay, WI?

The average high peaks at 80 °F in July, with about 6 days a year at 90 °F or more.

What kind of soil does 54313 have?

The USDA soil survey maps Sisson at the center of ZIP 54313: fine sandy loam, well drained, pH about 6.7 (neutral).

Did spring come early in Green Bay, WI in 2026?

Spring leaf-out near 54313 came on Apr 15 in 2026, 3 days earlier than the 1991–2020 average (Apr 18), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Green Bay, WI?

Long-day onions: the longest day near 54313 is 15 h 34 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 54313 change?

Yes. The 2012 USDA map put 54313 in zone 5a; the 2023 map puts it in zone 5b. The newer map uses 1991–2020 data and more weather stations.