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

Planting zone for 53063 — Newton, WI

ZIP code 53063 (Newton, Manitowoc County) is in USDA zone 5b: the coldest winter night averages −15 to −10 °F. The median last spring frost is April 30 and the first fall frost October 20.

Where ZIP 53063 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 frostApr 30

First frostOct 20

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 Newton, 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 Newton, WI

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostApril 30median — 50% chance of a later frost

Safe for tender plantsMay 15only 10% chance of frost after

First fall frostOctober 20median — 10% chance by Oct 3

Growing season171 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 16 and returns around November 1.

From the NOAA station Manitowoc, WI — 11 miles away, elevation 584 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 53063

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Mar 19 – Apr 2

SpinachSow outdoors · Mar 19 – Apr 9

Broccoli, cabbageStart indoors · Feb 19 – Mar 5

Broccoli, cabbageTransplant · Apr 9 – Apr 23

Onion setsPlant outdoors · Apr 2 – Apr 16

PotatoesPlant outdoors · Apr 9 – Apr 23

LettuceSow outdoors · Apr 2 – Apr 16

Carrots, beetsSow outdoors · Apr 9 – Apr 23

TomatoesStart indoors · Mar 5 – Mar 19

TomatoesTransplant · May 7 – May 21

Peppers, eggplantStart indoors · Feb 19 – Mar 5

Peppers, eggplantTransplant · May 14 – May 28

BeansSow outdoors · May 7 – May 21

Sweet cornSow outdoors · May 7 – May 21

Cucumbers, squashSow outdoors · May 7 – May 21

Fall lettuce, spinachSow outdoors · Aug 25 – Sep 8

GarlicPlant cloves · Oct 6 – Nov 10

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 30) and first fall frost (Oct 20) 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 53063 came on Apr 14 — 5 days earlier than the 1991–2020 average (Apr 19).

average
Apr 192026
Apr 14

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 Newton, WI.

Soil in Newton, WI

The soil mapped at the center of ZIP 53063 is Kewaunee — 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 groupDwater soaks in very slowly

Farmland classprime farmlandUSDA classification

Map unit: Kewaunee loam, 2 to 6 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 53063; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Newton, WI

Summer high77 °Faverage high, July

Winter low13 °Faverage low, January

Hot days3days a year at 90 °F or more

Freezing nights139nights a year at 32 °F or less

Growing degree days2,113base 50 °F — the season’s usable heat

Longest day15 h 29 mindaylight on June 21

Shortest day8 h 53 mindaylight on December 21

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

Precipitation31.4 inper year, rain and melted snow

Snowfall35 inper year

Average high and low, by month

Precipitation by month inches · ❄ = snowfall

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Manitowoc, WI (11 mi away); precipitation: Manitowoc, WI (11 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 5b.

Saint Nazianz, WI · 7 mi

530425b

Kiel, WI · 8 mi

542205b

Manitowoc, WI · 10 mi

530835b

Sheboygan, WI · 10 mi

542075b

Collins, WI · 12 mi

530205b

Elkhart Lake, WI · 13 mi

Wisconsin planting zones →

Questions about 53063

What planting zone is ZIP code 53063?

ZIP code 53063 (Newton, 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 Newton, WI?

The median last spring frost (32 °F) near 53063 is April 30; after May 15 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Manitowoc station.

When is the first frost in Newton, WI?

The median first fall frost near 53063 is October 20, giving a median frost-free growing season of 171 days.

When should I plant tomatoes in 53063?

Start tomato seeds indoors around Mar 5 – Mar 19 and set transplants outside around May 7 – May 21, one to three weeks after the median last frost.

How much rain and snow does 53063 get?

About 31.4 inches of precipitation a year and 35 inches of snowfall (NOAA 1991–2020 normals, Manitowoc station).

How hot do summers get in Newton, WI?

The average high peaks at 77 °F in July, with about 3 days a year at 90 °F or more.

What kind of soil does 53063 have?

The USDA soil survey maps Kewaunee at the center of ZIP 53063: loam, well drained, pH about 6.5 (neutral).

Did spring come early in Newton, WI in 2026?

Spring leaf-out near 53063 came on Apr 14 in 2026, 5 days earlier than the 1991–2020 average (Apr 19), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Newton, WI?

Long-day onions: the longest day near 53063 is 15 h 29 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).