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

Planting zone for 42354 — Mc Henry, KY

ZIP code 42354 (Mc Henry, Ohio County) is in USDA zone 7a: the coldest winter night averages 0 to 5 °F. The median last spring frost is April 10 and the first fall frost October 22.

Where ZIP 42354 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.

Zone7a0 to 5 °F

Coldest night−17.8 to −15 °C

Last frostApr 10

First frostOct 22

2012 zone6b

Was 6b 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 7a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Mc Henry, KY…

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 Henry, KY

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostApril 10median — 50% chance of a later frost

Safe for tender plantsApril 29only 10% chance of frost after

First fall frostOctober 22median — 10% chance by Oct 8

Growing season192 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 31 and returns around November 1.

From the NOAA station Beaver Dam, KY — 6 miles away, elevation 400 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 42354

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Feb 27 – Mar 13

SpinachSow outdoors · Feb 27 – Mar 20

Broccoli, cabbageStart indoors · Jan 30 – Feb 13

Broccoli, cabbageTransplant · Mar 20 – Apr 3

Onion setsPlant outdoors · Mar 13 – Mar 27

PotatoesPlant outdoors · Mar 20 – Apr 3

LettuceSow outdoors · Mar 13 – Mar 27

Carrots, beetsSow outdoors · Mar 20 – Apr 3

TomatoesStart indoors · Feb 13 – Feb 27

TomatoesTransplant · Apr 17 – May 1

Peppers, eggplantStart indoors · Jan 30 – Feb 13

Peppers, eggplantTransplant · Apr 24 – May 8

BeansSow outdoors · Apr 17 – May 1

Sweet cornSow outdoors · Apr 17 – May 1

Cucumbers, squashSow outdoors · Apr 17 – May 1

Fall lettuce, spinachSow outdoors · Aug 27 – Sep 10

GarlicPlant cloves · Oct 8 – Nov 12

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 10) and first fall frost (Oct 22) 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 42354 came on Mar 2 — 4 days earlier than the 1991–2020 average (Mar 6).

average
Mar 62026
Mar 2

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 7a in Kentucky

547 plants native to the lower 48 states, recorded in Kentucky, and rated by the USDA to survive 0 °F or colder — the bottom of zone 7a. 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 Mc Henry, KY.

Soil in Mc Henry, KY

The soil mapped at the center of ZIP 42354 is Frondorf — silt loam, well drained.

TextureSilt loama good balance for most vegetables

pH5.0strongly acidic; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter1.25%low — add compost

Hydrologic groupCwater soaks in slowly

Farmland classNot prime farmlandUSDA classification

Map unit: Frondorf-Wellston-Rosine silt loams, 12 to 20 percent slopes, 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 42354; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Mc Henry, KY

Summer high88 °Faverage high, July

Winter low24 °Faverage low, January

Hot days39days a year at 90 °F or more

Freezing nights92nights a year at 32 °F or less

Growing degree days4,246base 50 °F — the season’s usable heat

Longest day14 h 44 mindaylight on June 21

Shortest day9 h 35 mindaylight on December 21

Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully

Precipitation52 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: Beaver Dam, KY (6 mi away); precipitation: Beaver Dam, KY (6 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 7a.

423697a

Rockport, KY · 4 mi

423207a

Beaver Dam, KY · 5 mi

423287a

Centertown, KY · 7 mi

Central City, KY · 11 mi

423707a

Rosine, KY · 12 mi

Kentucky planting zones →

Questions about 42354

What planting zone is ZIP code 42354?

ZIP code 42354 (Mc Henry, KY) is in USDA hardiness zone 7a on the 2023 map: the coldest night of an average winter reaches 0 to 5 °F (−17.8 to −15 °C).

When is the last frost in Mc Henry, KY?

The median last spring frost (32 °F) near 42354 is April 10; after April 29 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Beaver Dam station.

When is the first frost in Mc Henry, KY?

The median first fall frost near 42354 is October 22, giving a median frost-free growing season of 192 days.

When should I plant tomatoes in 42354?

Start tomato seeds indoors around Feb 13 – Feb 27 and set transplants outside around Apr 17 – May 1, one to three weeks after the median last frost.

How much rain and snow does 42354 get?

About 52 inches of precipitation a year (NOAA 1991–2020 normals, Beaver Dam station).

How hot do summers get in Mc Henry, KY?

The average high peaks at 88 °F in July, with about 39 days a year at 90 °F or more.

What kind of soil does 42354 have?

The USDA soil survey maps Frondorf at the center of ZIP 42354: silt loam, well drained, pH about 5.0 (strongly acidic).

Did spring come early in Mc Henry, KY in 2026?

Spring leaf-out near 42354 came on Mar 2 in 2026, 4 days earlier than the 1991–2020 average (Mar 6), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Mc Henry, KY?

Intermediate onions: the longest day near 42354 is 14 h 44 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Did the zone for 42354 change?

Yes. The 2012 USDA map put 42354 in zone 6b; the 2023 map puts it in zone 7a. The newer map uses 1991–2020 data and more weather stations.