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

Planting zone for 54857 — Mikana, WI

ZIP code 54857 (Mikana, Barron County) is in USDA zone 4a: the coldest winter night averages −30 to −25 °F. The median last spring frost is May 9 and the first fall frost September 29.

Where ZIP 54857 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.

Zone4a−30 to −25 °F
Coldest night−34.4 to −31.7 °C
Last frostMay 9
First frostSep 29
2012 zone4a

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 4a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Mikana, 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 Mikana, WI

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMay 9median — 50% chance of a later frost
Safe for tender plantsMay 27only 10% chance of frost after
First fall frostSeptember 29median — 10% chance by Sep 14
Growing season140 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 28 and returns around October 10.

From the NOAA station Weyerhaeuser 1n, WI — 14 miles away, elevation 1,194 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 54857

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 28 – Apr 11
SpinachSow outdoors · Mar 28 – Apr 18
Broccoli, cabbageStart indoors · Feb 28 – Mar 14
Broccoli, cabbageTransplant · Apr 18 – May 2
Onion setsPlant outdoors · Apr 11 – Apr 25
PotatoesPlant outdoors · Apr 18 – May 2
LettuceSow outdoors · Apr 11 – Apr 25
Carrots, beetsSow outdoors · Apr 18 – May 2
TomatoesStart indoors · Mar 14 – Mar 28
TomatoesTransplant · May 16 – May 30
Peppers, eggplantStart indoors · Feb 28 – Mar 14
Peppers, eggplantTransplant · May 23 – Jun 6
BeansSow outdoors · May 16 – May 30
Sweet cornSow outdoors · May 16 – May 30
Cucumbers, squashSow outdoors · May 16 – May 30
Fall lettuce, spinachSow outdoors · Aug 4 – Aug 18
GarlicPlant cloves · Sep 15 – Oct 20
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 9) and first fall frost (Sep 29) 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 54857 came on Apr 16 — 4 days earlier than the 1991–2020 average (Apr 20).

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 4a in Wisconsin

419 plants native to the lower 48 states, recorded in Wisconsin, and rated by the USDA to survive −30 °F or colder — the bottom of zone 4a. Each links to its USDA PLANTS profile.

Trees 45

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 71

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 157

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 133

arctic 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 °FBebb's sedge3 ft · blooms late spring · low shade tolerance · to −38 °FBicknell's sedge3 ft · blooms late spring · low shade tolerance · to −38 °Fbig bluestem6 ft · blooms summer · high shade tolerance · to −46 °F

Vines 3

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 °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 Mikana, WI.

Soil in Mikana, WI

The soil mapped at the center of ZIP 54857 is Anigon — silt loam, well drained.

TextureSilt loama good balance for most vegetables
pH5.9moderately acidic; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter2%moderate
Hydrologic groupBwater soaks in moderately
Farmland classprime farmlandUSDA classification

Map unit: Anigon silt loam, 2 to 6 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 54857; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Mikana, WI

Summer high81 °Faverage high, July
Winter low5 °Faverage low, January
Hot days4days a year at 90 °F or more
Freezing nights176nights a year at 32 °F or less
Growing degree days2,205base 50 °F — the season’s usable heat
Longest day15 h 42 mindaylight on June 21
Shortest day8 h 41 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
Snowfall49 inper year; 109 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 23 °F, low 5 °F 23°5° JanFebruary: average high 28 °F, low 8 °F 28°8° FebMarch: average high 41 °F, low 20 °F 41°20° MarApril: average high 56 °F, low 32 °F 56°32° AprMay: average high 68 °F, low 44 °F 68°44° MayJune: average high 77 °F, low 53 °F 77°53° JunJuly: average high 81 °F, low 58 °F 81°58° JulAugust: average high 78 °F, low 56 °F 78°56° AugSeptember: average high 71 °F, low 48 °F 71°48° SepOctober: average high 57 °F, low 36 °F 57°36° OctNovember: average high 40 °F, low 24 °F 40°24° NovDecember: average high 27 °F, low 12 °F 27°12° Dec

Precipitation by month inches · ❄ = snowfall

0″1″2″3″4″5″January: 0.90 in precipitation, 11.5 in snowfall 0.9❄12 JanFebruary: 1.10 in precipitation, 7.3 in snowfall 1.1❄7 FebMarch: 2.19 in precipitation, 9.9 in snowfall 2.2❄10 MarApril: 2.99 in precipitation, 3.2 in snowfall 3.0❄3 AprMay: 4.31 in precipitation 4.3 MayJune: 4.42 in precipitation 4.4 JunJuly: 3.95 in precipitation 4.0 JulAugust: 4.04 in precipitation 4.0 AugSeptember: 3.84 in precipitation 3.8 SepOctober: 3.15 in precipitation, 1.2 in snowfall 3.1❄1 OctNovember: 2.04 in precipitation, 9 in snowfall 2.0❄9 NovDecember: 1.31 in precipitation, 7.3 in snowfall 1.3❄7 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Weyerhaeuser 1n, WI (14 mi away); precipitation: Weyerhaeuser 1n, WI (14 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

548174a
Birchwood, WI · 7 mi
548684b
Rice Lake, WI · 7 mi
548414a
Haugen, WI · 9 mi
548704a
Sarona, WI · 12 mi
548954a
Weyerhaeuser, WI · 12 mi
548224b
Cameron, WI · 14 mi
548194b
Bruce, WI · 17 mi
548764a
Stone Lake, WI · 17 mi

Wisconsin planting zones →

Questions about 54857

What planting zone is ZIP code 54857?

ZIP code 54857 (Mikana, WI) is in USDA hardiness zone 4a on the 2023 map: the coldest night of an average winter reaches −30 to −25 °F (−34.4 to −31.7 °C).

When is the last frost in Mikana, WI?

The median last spring frost (32 °F) near 54857 is May 9; after May 27 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Weyerhaeuser 1n station.

When is the first frost in Mikana, WI?

The median first fall frost near 54857 is September 29, giving a median frost-free growing season of 140 days.

When should I plant tomatoes in 54857?

Start tomato seeds indoors around Mar 14 – Mar 28 and set transplants outside around May 16 – May 30, one to three weeks after the median last frost.

How much rain and snow does 54857 get?

About 34.2 inches of precipitation a year and 49 inches of snowfall (NOAA 1991–2020 normals, Weyerhaeuser 1n station).

How hot do summers get in Mikana, WI?

The average high peaks at 81 °F in July, with about 4 days a year at 90 °F or more.

What kind of soil does 54857 have?

The USDA soil survey maps Anigon at the center of ZIP 54857: silt loam, well drained, pH about 5.9 (moderately acidic).

Did spring come early in Mikana, WI in 2026?

Spring leaf-out near 54857 came on Apr 16 in 2026, 4 days earlier than the 1991–2020 average (Apr 20), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Mikana, WI?

Long-day onions: the longest day near 54857 is 15 h 42 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).