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

Planting zone for 54618 — Camp Douglas, WI

ZIP code 54618 (Camp Douglas, Juneau County) is in USDA zone 4b: the coldest winter night averages −25 to −20 °F. The median last spring frost is May 1 and the first fall frost October 3.

Where ZIP 54618 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 1
First frostOct 3
2012 zone4b

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 4b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Camp Douglas, 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 Camp Douglas, WI

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMay 1median — 50% chance of a later frost
Safe for tender plantsMay 14only 10% chance of frost after
First fall frostOctober 3median — 10% chance by Sep 20
Growing season157 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 20 and returns around October 15.

From the NOAA station Necedah 5 Wnw, WI — 9 miles away, elevation 932 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 54618

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 20 – Apr 3
SpinachSow outdoors · Mar 20 – Apr 10
Broccoli, cabbageStart indoors · Feb 20 – Mar 6
Broccoli, cabbageTransplant · Apr 10 – Apr 24
Onion setsPlant outdoors · Apr 3 – Apr 17
PotatoesPlant outdoors · Apr 10 – Apr 24
LettuceSow outdoors · Apr 3 – Apr 17
Carrots, beetsSow outdoors · Apr 10 – Apr 24
TomatoesStart indoors · Mar 6 – Mar 20
TomatoesTransplant · May 8 – May 22
Peppers, eggplantStart indoors · Feb 20 – Mar 6
Peppers, eggplantTransplant · May 15 – May 29
BeansSow outdoors · May 8 – May 22
Sweet cornSow outdoors · May 8 – May 22
Cucumbers, squashSow outdoors · May 8 – May 22
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 1) 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 54618 came on Mar 30 — 16 days earlier than the 1991–2020 average (Apr 15).

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 Camp Douglas, WI.

Soil in Camp Douglas, WI

The soil mapped at the center of ZIP 54618 is Tarr — sand, excessively drained.

TextureSanddrains and warms fast; dries out and needs more feeding
pH5.5moderately acidic; most vegetables like 6.0–7.0
DrainageExcessively drainednatural drainage class
Organic matter3.5%moderate
Hydrologic groupAwater soaks in fast
Farmland classNot prime farmlandUSDA classification

Map unit: Tarr sand, 6 to 15 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 54618; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Camp Douglas, WI

Summer high81 °Faverage high, July
Winter low8 °Faverage low, January
Hot days6days a year at 90 °F or more
Freezing nights154nights a year at 32 °F or less
Growing degree days2,454base 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)
Precipitation34.5 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 8 °F 25°8° JanFebruary: average high 30 °F, low 11 °F 30°11° FebMarch: average high 42 °F, low 23 °F 42°23° MarApril: average high 56 °F, low 35 °F 56°35° AprMay: average high 69 °F, low 47 °F 69°47° MayJune: average high 77 °F, low 57 °F 77°57° JunJuly: average high 81 °F, low 60 °F 81°60° JulAugust: average high 79 °F, low 58 °F 79°58° AugSeptember: average high 71 °F, low 49 °F 71°49° SepOctober: average high 58 °F, low 38 °F 58°38° OctNovember: average high 43 °F, low 26 °F 43°26° NovDecember: average high 30 °F, low 15 °F 30°15° Dec

Precipitation by month inches

0″1″2″3″4″5″January: 1.30 in precipitation 1.3 JanFebruary: 1.31 in precipitation 1.3 FebMarch: 2.06 in precipitation 2.1 MarApril: 3.41 in precipitation 3.4 AprMay: 4.02 in precipitation 4.0 MayJune: 4.43 in precipitation 4.4 JunJuly: 3.91 in precipitation 3.9 JulAugust: 4.46 in precipitation 4.5 AugSeptember: 3.39 in precipitation 3.4 SepOctober: 2.67 in precipitation 2.7 OctNovember: 1.85 in precipitation 1.9 NovDecember: 1.65 in precipitation 1.6 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Necedah 5 Wnw, WI (9 mi away); precipitation: Necedah 5 Wnw, WI (9 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.

546494b
Oakdale, WI · 4 mi
546374b
Hustler, WI · 6 mi
539504b
New Lisbon, WI · 9 mi
546604b
Tomah, WI · 11 mi
546464b
Necedah, WI · 13 mi
546705a
Wilton, WI · 13 mi
546385a
Kendall, WI · 14 mi
546624b
Tunnel City, WI · 14 mi

Wisconsin planting zones →

Questions about 54618

What planting zone is ZIP code 54618?

ZIP code 54618 (Camp Douglas, 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 Camp Douglas, WI?

The median last spring frost (32 °F) near 54618 is May 1; after May 14 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Necedah 5 Wnw station.

When is the first frost in Camp Douglas, WI?

The median first fall frost near 54618 is October 3, giving a median frost-free growing season of 157 days.

When should I plant tomatoes in 54618?

Start tomato seeds indoors around Mar 6 – Mar 20 and set transplants outside around May 8 – May 22, one to three weeks after the median last frost.

How much rain and snow does 54618 get?

About 34.5 inches of precipitation a year (NOAA 1991–2020 normals, Necedah 5 Wnw station).

How hot do summers get in Camp Douglas, WI?

The average high peaks at 81 °F in July, with about 6 days a year at 90 °F or more.

What kind of soil does 54618 have?

The USDA soil survey maps Tarr at the center of ZIP 54618: sand, excessively drained, pH about 5.5 (moderately acidic).

Did spring come early in Camp Douglas, WI in 2026?

Spring leaf-out near 54618 came on Mar 30 in 2026, 16 days earlier than the 1991–2020 average (Apr 15), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Camp Douglas, WI?

Long-day onions: the longest day near 54618 is 15 h 29 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).