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

Planting zone for 54422 — Curtiss, WI

ZIP code 54422 (Curtiss, Clark County) is in USDA zone 4b: the coldest winter night averages −25 to −20 °F. The median last spring frost is May 13 and the first fall frost September 26.

Where ZIP 54422 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 13
First frostSep 26
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 Curtiss, 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 Curtiss, WI

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMay 13median — 50% chance of a later frost
Safe for tender plantsMay 29only 10% chance of frost after
First fall frostSeptember 26median — 10% chance by Sep 12
Growing season136 daysfrost-free, median

A hard freeze (28 °F) usually ends around May 2 and returns around October 5.

From the NOAA station Owen 1e, WI — 6 miles away, elevation 1,237 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 54422

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Apr 1 – Apr 15
SpinachSow outdoors · Apr 1 – Apr 22
Broccoli, cabbageStart indoors · Mar 4 – Mar 18
Broccoli, cabbageTransplant · Apr 22 – May 6
Onion setsPlant outdoors · Apr 15 – Apr 29
PotatoesPlant outdoors · Apr 22 – May 6
LettuceSow outdoors · Apr 15 – Apr 29
Carrots, beetsSow outdoors · Apr 22 – May 6
TomatoesStart indoors · Mar 18 – Apr 1
TomatoesTransplant · May 20 – Jun 3
Peppers, eggplantStart indoors · Mar 4 – Mar 18
Peppers, eggplantTransplant · May 27 – Jun 10
BeansSow outdoors · May 20 – Jun 3
Sweet cornSow outdoors · May 20 – Jun 3
Cucumbers, squashSow outdoors · May 20 – Jun 3
Fall lettuce, spinachSow outdoors · Aug 1 – Aug 15
GarlicPlant cloves · Sep 12 – Oct 17
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 13) and first fall frost (Sep 26) 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 54422 came on Apr 16 — 5 days earlier than the 1991–2020 average (Apr 21).

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.

Trees 48

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 89

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 178

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 152

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 4

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 °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 Curtiss, WI.

Soil in Curtiss, WI

The soil mapped at the center of ZIP 54422 is Withee — silt loam, somewhat poorly drained.

TextureSilt loama good balance for most vegetables
pH5.9moderately acidic; most vegetables like 6.0–7.0
DrainageSomewhat poorly drainedconsider raised beds
Organic matter3.5%moderate
Hydrologic groupC/Dslow when drained; wet otherwise
Farmland classPrime farmland if drainedUSDA classification

Map unit: Withee silt loam, 0 to 3 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 54422; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Curtiss, WI

Summer high79 °Faverage high, July
Winter low2 °Faverage low, January
Hot days3days a year at 90 °F or more
Freezing nights173nights a year at 32 °F or less
Growing degree days2,010base 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)
Precipitation34.2 inper year, rain and melted snow
Snowfall51 inper year; 108 days with snow on the ground

Average high and low, by month

−10°0°10°20°30°40°50°60°70°80°90°32 °FJanuary: average high 21 °F, low 2 °F 21°2° JanFebruary: average high 26 °F, low 4 °F 26°4° FebMarch: average high 38 °F, low 17 °F 38°17° MarApril: average high 52 °F, low 31 °F 52°31° AprMay: average high 66 °F, low 43 °F 66°43° MayJune: average high 75 °F, low 53 °F 75°53° JunJuly: average high 79 °F, low 56 °F 79°56° JulAugust: average high 77 °F, low 54 °F 77°54° AugSeptember: average high 69 °F, low 46 °F 69°46° SepOctober: average high 55 °F, low 34 °F 55°34° OctNovember: average high 40 °F, low 23 °F 40°23° NovDecember: average high 27 °F, low 10 °F 27°10° Dec

Precipitation by month inches · ❄ = snowfall

0″1″2″3″4″5″January: 1.06 in precipitation, 10.9 in snowfall 1.1❄11 JanFebruary: 1.15 in precipitation, 10.2 in snowfall 1.1❄10 FebMarch: 1.81 in precipitation, 8.5 in snowfall 1.8❄9 MarApril: 2.98 in precipitation, 3.7 in snowfall 3.0❄4 AprMay: 3.99 in precipitation, 0.2 in snowfall 4.0 MayJune: 4.77 in precipitation 4.8 JunJuly: 3.81 in precipitation 3.8 JulAugust: 4.42 in precipitation 4.4 AugSeptember: 3.95 in precipitation 4.0 SepOctober: 2.93 in precipitation, 0.9 in snowfall 2.9❄1 OctNovember: 1.85 in precipitation, 4.9 in snowfall 1.9❄5 NovDecember: 1.51 in precipitation, 11.7 in snowfall 1.5❄12 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Owen 1e, WI (6 mi away); precipitation: Owen 1e, WI (6 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

544604b
Owen, WI · 5 mi
544254b
Dorchester, WI · 5 mi
544054b
Abbotsford, WI · 8 mi
544214b
Colby, WI · 10 mi
544984a
Withee, WI · 10 mi
544804b
Stetsonville, WI · 10 mi
544884b
Unity, WI · 10 mi
544514a
Medford, WI · 15 mi

Wisconsin planting zones →

Questions about 54422

What planting zone is ZIP code 54422?

ZIP code 54422 (Curtiss, 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 Curtiss, WI?

The median last spring frost (32 °F) near 54422 is May 13; after May 29 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Owen 1e station.

When is the first frost in Curtiss, WI?

The median first fall frost near 54422 is September 26, giving a median frost-free growing season of 136 days.

When should I plant tomatoes in 54422?

Start tomato seeds indoors around Mar 18 – Apr 1 and set transplants outside around May 20 – Jun 3, one to three weeks after the median last frost.

How much rain and snow does 54422 get?

About 34.2 inches of precipitation a year and 51 inches of snowfall (NOAA 1991–2020 normals, Owen 1e station).

How hot do summers get in Curtiss, WI?

The average high peaks at 79 °F in July, with about 3 days a year at 90 °F or more.

What kind of soil does 54422 have?

The USDA soil survey maps Withee at the center of ZIP 54422: silt loam, somewhat poorly drained, pH about 5.9 (moderately acidic).

Did spring come early in Curtiss, WI in 2026?

Spring leaf-out near 54422 came on Apr 16 in 2026, 5 days earlier than the 1991–2020 average (Apr 21), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Curtiss, WI?

Long-day onions: the longest day near 54422 is 15 h 37 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 54422 change?

Yes. The 2012 USDA map put 54422 in zone 4a; the 2023 map puts it in zone 4b. The newer map uses 1991–2020 data and more weather stations.