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

Planting zone for 54560 — Sayner, WI

ZIP code 54560 (Sayner, Vilas County) is in USDA zone 4b: the coldest winter night averages −25 to −20 °F. The median last spring frost is May 19 and the first fall frost October 3.

Where ZIP 54560 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.

Zone4b−25 to −20 °F

Coldest night−31.7 to −28.9 °C

Last frostMay 19

First frostOct 3

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 Sayner, 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 Sayner, WI

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostMay 19median — 50% chance of a later frost

Safe for tender plantsMay 31only 10% chance of frost after

First fall frostOctober 3median — 10% chance by Sep 18

Growing season136 daysfrost-free, median

A hard freeze (28 °F) usually ends around May 8 and returns around October 12.

From the NOAA station St Germain, WI — 9 miles away, elevation 1,644 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 54560

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Apr 7 – Apr 21

SpinachSow outdoors · Apr 7 – Apr 28

Broccoli, cabbageStart indoors · Mar 10 – Mar 24

Broccoli, cabbageTransplant · Apr 28 – May 12

Onion setsPlant outdoors · Apr 21 – May 5

PotatoesPlant outdoors · Apr 28 – May 12

LettuceSow outdoors · Apr 21 – May 5

Carrots, beetsSow outdoors · Apr 28 – May 12

TomatoesStart indoors · Mar 24 – Apr 7

TomatoesTransplant · May 26 – Jun 9

Peppers, eggplantStart indoors · Mar 10 – Mar 24

Peppers, eggplantTransplant · Jun 2 – Jun 16

BeansSow outdoors · May 26 – Jun 9

Sweet cornSow outdoors · May 26 – Jun 9

Cucumbers, squashSow outdoors · May 26 – Jun 9

Fall lettuce, spinachSow outdoors · Aug 8 – Aug 22

GarlicPlant cloves · Sep 19 – Oct 24

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 19) and first fall frost (Oct 3) 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 54560 came on Apr 23 — 5 days earlier than the 1991–2020 average (Apr 28).

average
Apr 282026
Apr 23

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 Wisconsin

486 plants native to the lower 48 states, recorded in Wisconsin, and rated by the USDA to survive −25 °F or colder — the bottom of zone 4b. 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 Sayner, WI.

Soil in Sayner, WI

The soil mapped at the center of ZIP 54560 is Padus — sandy loam, well drained.

TextureSandy loamdrains and warms fast; dries out and needs more feeding

pH5.9moderately acidic; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter2%moderate

Hydrologic groupBwater soaks in moderately

Farmland classNot prime farmlandUSDA classification

Map unit: Padus-Pence sandy loams, 15 to 35 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 54560; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Sayner, WI

Summer high75 °Faverage high, July

Winter low1 °Faverage low, January

Hot days1days a year at 90 °F or more

Freezing nights191nights a year at 32 °F or less

Growing degree days1,688base 50 °F — the season’s usable heat

Longest day15 h 46 mindaylight on June 21

Shortest day8 h 38 mindaylight on December 21

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

Precipitation33.6 inper year, rain and melted snow

Snowfall74 inper year; 138 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: St Germain, WI (9 mi away); precipitation: St Germain, WI (9 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

5 of the 8 nearest ZIP codes are in a different zone — elevation and distance from water change winter lows quickly.

545124a

Boulder Junction, WI · 6 mi

Saint Germain, WI · 8 mi

545404a

Land O Lakes, WI · 12 mi

545194b

Conover, WI · 14 mi

545574a

Presque Isle, WI · 15 mi

545394a

Lake Tomahawk, WI · 16 mi

Wisconsin planting zones →

Questions about 54560

What planting zone is ZIP code 54560?

ZIP code 54560 (Sayner, WI) 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 Sayner, WI?

The median last spring frost (32 °F) near 54560 is May 19; after May 31 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, St Germain station.

When is the first frost in Sayner, WI?

The median first fall frost near 54560 is October 3, giving a median frost-free growing season of 136 days.

When should I plant tomatoes in 54560?

Start tomato seeds indoors around Mar 24 – Apr 7 and set transplants outside around May 26 – Jun 9, one to three weeks after the median last frost.

How much rain and snow does 54560 get?

About 33.6 inches of precipitation a year and 74 inches of snowfall (NOAA 1991–2020 normals, St Germain station).

How hot do summers get in Sayner, WI?

The average high peaks at 75 °F in July, with about 1 days a year at 90 °F or more.

What kind of soil does 54560 have?

The USDA soil survey maps Padus at the center of ZIP 54560: sandy loam, well drained, pH about 5.9 (moderately acidic).

Did spring come early in Sayner, WI in 2026?

Spring leaf-out near 54560 came on Apr 23 in 2026, 5 days earlier than the 1991–2020 average (Apr 28), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Sayner, WI?

Long-day onions: the longest day near 54560 is 15 h 46 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 54560 change?

Yes. The 2012 USDA map put 54560 in zone 4a; the 2023 map puts it in zone 4b. The newer map uses 1991–2020 data and more weather stations.