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

Planting zone for 54543 — Mc Naughton, WI

ZIP code 54543 (Mc Naughton, Oneida County) is in USDA zone 4b: the coldest winter night averages −25 to −20 °F. The median last spring frost is May 26 and the first fall frost September 23.

Where ZIP 54543 is

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 26
First frostSep 23
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 Mc Naughton, 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 Mc Naughton, WI

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMay 26median — 50% chance of a later frost
Safe for tender plantsJune 8only 10% chance of frost after
First fall frostSeptember 23median — 10% chance by Sep 5
Growing season120 daysfrost-free, median

A hard freeze (28 °F) usually ends around May 13 and returns around October 2.

From the NOAA station Rhinelander Oneida Airport, WI — 7 miles away, elevation 1,598 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 54543

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Apr 14 – Apr 28
SpinachSow outdoors · Apr 14 – May 5
Broccoli, cabbageStart indoors · Mar 17 – Mar 31
Broccoli, cabbageTransplant · May 5 – May 19
Onion setsPlant outdoors · Apr 28 – May 12
PotatoesPlant outdoors · May 5 – May 19
LettuceSow outdoors · Apr 28 – May 12
Carrots, beetsSow outdoors · May 5 – May 19
TomatoesStart indoors · Mar 31 – Apr 14
TomatoesTransplant · Jun 2 – Jun 16
Peppers, eggplantStart indoors · Mar 17 – Mar 31
Peppers, eggplantTransplant · Jun 9 – Jun 23
BeansSow outdoors · Jun 2 – Jun 16
Sweet cornSow outdoors · Jun 2 – Jun 16
Cucumbers, squashSow outdoors · Jun 2 – Jun 16
Fall lettuce, spinachSow outdoors · Jul 29 – Aug 12
GarlicPlant cloves · Sep 9 – Oct 14
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 26) and first fall frost (Sep 23) 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 54543 came on Apr 22 — 4 days earlier than the 1991–2020 average (Apr 26).

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).

Soil in Mc Naughton, WI

The soil mapped at the center of ZIP 54543 is Carbondale — muck, very poorly drained.

TextureMucktop layer
DrainageVery poorly drainedconsider raised beds
Organic matter60%high
Hydrologic groupA/Ddrains fast once dried out; wet otherwise
Farmland classNot prime farmlandUSDA classification

Map unit: Carbondale, Lupton, and Markey mucks, 0 to 1 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 54543; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Mc Naughton, WI

Summer high80 °Faverage high, July
Winter low4 °Faverage low, January
Hot days4days a year at 90 °F or more
Freezing nights185nights a year at 32 °F or less
Growing degree days1,880base 50 °F — the season’s usable heat
Longest day15 h 43 mindaylight on June 21
Shortest day8 h 40 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation29.6 inper year, rain and melted snow

Average high and low, by month

−10°0°10°20°30°40°50°60°70°80°90°32 °FJanuary: average high 23 °F, low 4 °F 23°4° JanFebruary: average high 27 °F, low 6 °F 27°6° FebMarch: average high 39 °F, low 17 °F 39°17° MarApril: average high 52 °F, low 29 °F 52°29° AprMay: average high 66 °F, low 41 °F 66°41° MayJune: average high 76 °F, low 50 °F 76°50° JunJuly: average high 80 °F, low 54 °F 80°54° JulAugust: average high 77 °F, low 52 °F 77°52° AugSeptember: average high 69 °F, low 45 °F 69°45° SepOctober: average high 55 °F, low 34 °F 55°34° OctNovember: average high 39 °F, low 23 °F 39°23° NovDecember: average high 27 °F, low 11 °F 27°11° Dec

Precipitation by month inches

0″1″2″3″4″5″January: 0.83 in precipitation 0.8 JanFebruary: 0.79 in precipitation 0.8 FebMarch: 1.52 in precipitation 1.5 MarApril: 2.65 in precipitation 2.6 AprMay: 3.42 in precipitation 3.4 MayJune: 3.93 in precipitation 3.9 JunJuly: 4.02 in precipitation 4.0 JulAugust: 3.09 in precipitation 3.1 AugSeptember: 3.48 in precipitation 3.5 SepOctober: 2.95 in precipitation 3.0 OctNovember: 1.75 in precipitation 1.8 NovDecember: 1.20 in precipitation 1.2 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Rhinelander Oneida Airport, WI (7 mi away); precipitation: Rhinelander Oneida Airport, WI (7 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

545394a
Lake Tomahawk, WI · 6 mi
545294a
Harshaw, WI · 6 mi
545314a
Hazelhurst, WI · 11 mi
545014b
Rhinelander, WI · 11 mi
545584a
Saint Germain, WI · 14 mi
545324a
Heafford Junction, WI · 14 mi
545484a
Minocqua, WI · 17 mi
544874a
Tomahawk, WI · 17 mi

Wisconsin planting zones →

Questions about 54543

What planting zone is ZIP code 54543?

ZIP code 54543 (Mc Naughton, 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 Mc Naughton, WI?

The median last spring frost (32 °F) near 54543 is May 26; after June 8 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Rhinelander Oneida Airport station.

When is the first frost in Mc Naughton, WI?

The median first fall frost near 54543 is September 23, giving a median frost-free growing season of 120 days.

When should I plant tomatoes in 54543?

Start tomato seeds indoors around Mar 31 – Apr 14 and set transplants outside around Jun 2 – Jun 16, one to three weeks after the median last frost.

How much rain and snow does 54543 get?

About 29.6 inches of precipitation a year (NOAA 1991–2020 normals, Rhinelander Oneida Airport station).

How hot do summers get in Mc Naughton, WI?

The average high peaks at 80 °F in July, with about 4 days a year at 90 °F or more.

What kind of soil does 54543 have?

The USDA soil survey maps Carbondale at the center of ZIP 54543: muck, very poorly drained.

Did spring come early in Mc Naughton, WI in 2026?

Spring leaf-out near 54543 came on Apr 22 in 2026, 4 days earlier than the 1991–2020 average (Apr 26), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Mc Naughton, WI?

Long-day onions: the longest day near 54543 is 15 h 43 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 54543 change?

Yes. The 2012 USDA map put 54543 in zone 4a; the 2023 map puts it in zone 4b. The newer map uses 1991–2020 data and more weather stations.