Data: 2023 USDA zones (PRISM/OSU) · NOAA 1991–2020 normals · updated Oct 29, 2026

Planting zone for 53924 — Cazenovia, WI

ZIP code 53924 (Cazenovia, Richland County) is in USDA zone 5a: the coldest winter night averages −20 to −15 °F. The median last spring frost is May 12 and the first fall frost September 29.

Where ZIP 53924 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 12

First frostSep 29

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 Cazenovia, 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 Cazenovia, WI

JanFebMarAprMayJunJulAugSepOctNovDec

Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free

Last spring frostMay 12median — 50% chance of a later frost

Safe for tender plantsMay 26only 10% chance of frost after

First fall frostSeptember 29median — 10% chance by Sep 17

Growing season138 daysfrost-free, median

A hard freeze (28 °F) usually ends around May 1 and returns around October 8.

From the NOAA station Hillsboro 2sw, WI — 12 miles away, elevation 1,043 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 53924

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Mar 31 – Apr 14

SpinachSow outdoors · Mar 31 – Apr 21

Broccoli, cabbageStart indoors · Mar 3 – Mar 17

Broccoli, cabbageTransplant · Apr 21 – May 5

Onion setsPlant outdoors · Apr 14 – Apr 28

PotatoesPlant outdoors · Apr 21 – May 5

LettuceSow outdoors · Apr 14 – Apr 28

Carrots, beetsSow outdoors · Apr 21 – May 5

TomatoesStart indoors · Mar 17 – Mar 31

TomatoesTransplant · May 19 – Jun 2

Peppers, eggplantStart indoors · Mar 3 – Mar 17

Peppers, eggplantTransplant · May 26 – Jun 9

BeansSow outdoors · May 19 – Jun 2

Sweet cornSow outdoors · May 19 – Jun 2

Cucumbers, squashSow outdoors · May 19 – Jun 2

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 12) 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 53924 came on Mar 30 — 15 days earlier than the 1991–2020 average (Apr 14).

average
Apr 142026
Mar 30

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.

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 Cazenovia, WI.

Soil in Cazenovia, WI

The soil mapped at the center of ZIP 53924 is Elbaville — silt loam, well drained.

TextureSilt loama good balance for most vegetables

pH5.8moderately acidic; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter5%high

Hydrologic groupCwater soaks in slowly

Farmland classNot prime farmlandUSDA classification

Map unit: Elbaville silt loam, 20 to 30 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 53924; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Cazenovia, WI

Summer high80 °Faverage high, July

Winter low6 °Faverage low, January

Hot days2days a year at 90 °F or more

Freezing nights181nights a year at 32 °F or less

Growing degree days2,140base 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)

Precipitation36.2 inper year, rain and melted snow

Average high and low, by month

Precipitation by month inches

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Hillsboro 2sw, WI (12 mi away); precipitation: Hillsboro 2sw, WI (12 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.

539425a

Lime Ridge, WI · 5 mi

Hillsboro, WI · 11 mi

539685a

Wonewoc, WI · 11 mi

535815a

Richland Center, WI · 11 mi

539435a

Loganville, WI · 13 mi

539624b

Union Center, WI · 14 mi

Wisconsin planting zones →

Questions about 53924

What planting zone is ZIP code 53924?

ZIP code 53924 (Cazenovia, 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 Cazenovia, WI?

The median last spring frost (32 °F) near 53924 is May 12; after May 26 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Hillsboro 2sw station.

When is the first frost in Cazenovia, WI?

The median first fall frost near 53924 is September 29, giving a median frost-free growing season of 138 days.

When should I plant tomatoes in 53924?

Start tomato seeds indoors around Mar 17 – Mar 31 and set transplants outside around May 19 – Jun 2, one to three weeks after the median last frost.

How much rain and snow does 53924 get?

About 36.2 inches of precipitation a year (NOAA 1991–2020 normals, Hillsboro 2sw station).

How hot do summers get in Cazenovia, WI?

The average high peaks at 80 °F in July, with about 2 days a year at 90 °F or more.

What kind of soil does 53924 have?

The USDA soil survey maps Elbaville at the center of ZIP 53924: silt loam, well drained, pH about 5.8 (moderately acidic).

Did spring come early in Cazenovia, WI in 2026?

Spring leaf-out near 53924 came on Mar 30 in 2026, 15 days earlier than the 1991–2020 average (Apr 14), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Cazenovia, WI?

Long-day onions: the longest day near 53924 is 15 h 25 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).