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

Planting zone for 53942 — Lime Ridge, WI

ZIP code 53942 (Lime Ridge, Sauk County) is in USDA zone 5a: the coldest winter night averages −20 to −15 °F. The median last spring frost is May 2 and the first fall frost October 7.

Where ZIP 53942 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.

Zone5a−20 to −15 °F
Coldest night−28.9 to −26.1 °C
Last frostMay 2
First frostOct 7
2012 zone5a

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 5a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Lime Ridge, 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 Lime Ridge, WI

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMay 2median — 50% chance of a later frost
Safe for tender plantsMay 16only 10% chance of frost after
First fall frostOctober 7median — 10% chance by Sep 23
Growing season156 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 20 and returns around October 18.

From the NOAA station Reedsburg, WI — 9 miles away, elevation 925 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 53942

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 21 – Apr 4
SpinachSow outdoors · Mar 21 – Apr 11
Broccoli, cabbageStart indoors · Feb 21 – Mar 7
Broccoli, cabbageTransplant · Apr 11 – Apr 25
Onion setsPlant outdoors · Apr 4 – Apr 18
PotatoesPlant outdoors · Apr 11 – Apr 25
LettuceSow outdoors · Apr 4 – Apr 18
Carrots, beetsSow outdoors · Apr 11 – Apr 25
TomatoesStart indoors · Mar 7 – Mar 21
TomatoesTransplant · May 9 – May 23
Peppers, eggplantStart indoors · Feb 21 – Mar 7
Peppers, eggplantTransplant · May 16 – May 30
BeansSow outdoors · May 9 – May 23
Sweet cornSow outdoors · May 9 – May 23
Cucumbers, squashSow outdoors · May 9 – May 23
Fall lettuce, spinachSow outdoors · Aug 12 – Aug 26
GarlicPlant cloves · Sep 23 – Oct 28
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 2) and first fall frost (Oct 7) 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 53942 came on Mar 30 — 14 days earlier than the 1991–2020 average (Apr 13).

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 5a in Wisconsin

510 plants native to the lower 48 states, recorded in Wisconsin, and rated by the USDA to survive −20 °F or colder — the bottom of zone 5a. 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 93

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 191

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 158

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 5

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 °Fsummer grape30 ft · blooms late spring · low shade tolerance · to −23 °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 Lime Ridge, WI.

Soil in Lime Ridge, WI

The soil mapped at the center of ZIP 53942 is Valton — silt loam, well drained.

TextureSilt loama good balance for most vegetables
pH6.2slightly acidic; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter2.5%moderate
Hydrologic groupCwater soaks in slowly
Farmland classprime farmlandUSDA classification

Map unit: Valton silt loam, 2 to 6 percent slopes, moderately eroded.

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 53942; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Lime Ridge, WI

Summer high82 °Faverage high, July
Winter low8 °Faverage low, January
Hot days7days a year at 90 °F or more
Freezing nights154nights a year at 32 °F or less
Growing degree days2,595base 50 °F — the season’s usable heat
Longest day15 h 25 mindaylight on June 21
Shortest day8 h 57 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation39.6 inper year, rain and melted snow
Snowfall44 inper year; 71 days with snow on the ground

Average high and low, by month

0°10°20°30°40°50°60°70°80°90°32 °FJanuary: average high 27 °F, low 8 °F 27°8° JanFebruary: average high 32 °F, low 12 °F 32°12° FebMarch: average high 44 °F, low 23 °F 44°23° MarApril: average high 57 °F, low 35 °F 57°35° AprMay: average high 69 °F, low 47 °F 69°47° MayJune: average high 79 °F, low 57 °F 79°57° JunJuly: average high 82 °F, low 61 °F 82°61° JulAugust: average high 80 °F, low 58 °F 80°58° AugSeptember: average high 73 °F, low 50 °F 73°50° SepOctober: average high 60 °F, low 38 °F 60°38° OctNovember: average high 45 °F, low 27 °F 45°27° NovDecember: average high 33 °F, low 15 °F 33°15° Dec

Precipitation by month inches · ❄ = snowfall

0″1″2″3″4″5″6″January: 1.51 in precipitation, 9.9 in snowfall 1.5❄10 JanFebruary: 1.54 in precipitation, 14.8 in snowfall 1.5❄15 FebMarch: 2.20 in precipitation, 5.1 in snowfall 2.2❄5 MarApril: 3.84 in precipitation, 2.7 in snowfall 3.8❄3 AprMay: 4.29 in precipitation 4.3 MayJune: 5.40 in precipitation 5.4 JunJuly: 5.27 in precipitation 5.3 JulAugust: 4.74 in precipitation 4.7 AugSeptember: 3.55 in precipitation 3.5 SepOctober: 3.07 in precipitation, 0.4 in snowfall 3.1 OctNovember: 2.17 in precipitation, 1.7 in snowfall 2.2❄2 NovDecember: 1.99 in precipitation, 9.3 in snowfall 2.0❄9 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Reedsburg, WI (9 mi away); precipitation: Reedsburg, WI (9 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 5a.

539245a
Cazenovia, WI · 5 mi
539375a
Hillpoint, WI · 5 mi
539415a
La Valle, WI · 8 mi
539435a
Loganville, WI · 8 mi
539595a
Reedsburg, WI · 10 mi
539615a
Rock Springs, WI · 11 mi
539585a
Reedsburg, WI · 12 mi
535775a
Plain, WI · 12 mi

Wisconsin planting zones →

Questions about 53942

What planting zone is ZIP code 53942?

ZIP code 53942 (Lime Ridge, WI) is in USDA hardiness zone 5a on the 2023 map: the coldest night of an average winter reaches −20 to −15 °F (−28.9 to −26.1 °C).

When is the last frost in Lime Ridge, WI?

The median last spring frost (32 °F) near 53942 is May 2; after May 16 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Reedsburg station.

When is the first frost in Lime Ridge, WI?

The median first fall frost near 53942 is October 7, giving a median frost-free growing season of 156 days.

When should I plant tomatoes in 53942?

Start tomato seeds indoors around Mar 7 – Mar 21 and set transplants outside around May 9 – May 23, one to three weeks after the median last frost.

How much rain and snow does 53942 get?

About 39.6 inches of precipitation a year and 44 inches of snowfall (NOAA 1991–2020 normals, Reedsburg station).

How hot do summers get in Lime Ridge, WI?

The average high peaks at 82 °F in July, with about 7 days a year at 90 °F or more.

What kind of soil does 53942 have?

The USDA soil survey maps Valton at the center of ZIP 53942: silt loam, well drained, pH about 6.2 (slightly acidic).

Did spring come early in Lime Ridge, WI in 2026?

Spring leaf-out near 53942 came on Mar 30 in 2026, 14 days earlier than the 1991–2020 average (Apr 13), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Lime Ridge, WI?

Long-day onions: the longest day near 53942 is 15 h 25 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).