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

Planting zone for 42528 — Dunnville, KY

ZIP code 42528 (Dunnville, Casey County) is in USDA zone 7a: the coldest winter night averages 0 to 5 °F. The median last spring frost is April 18 and the first fall frost October 24.

Where ZIP 42528 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 18
First frostOct 24
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 Dunnville, 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 Dunnville, KY

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 18median — 50% chance of a later frost
Safe for tender plantsMay 3only 10% chance of frost after
First fall frostOctober 24median — 10% chance by Oct 11
Growing season189 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 6 and returns around November 2.

From the NOAA station Jamestown Wwtp, KY — 12 miles away, elevation 889 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 42528

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 7 – Mar 21
SpinachSow outdoors · Mar 7 – Mar 28
Broccoli, cabbageStart indoors · Feb 7 – Feb 21
Broccoli, cabbageTransplant · Mar 28 – Apr 11
Onion setsPlant outdoors · Mar 21 – Apr 4
PotatoesPlant outdoors · Mar 28 – Apr 11
LettuceSow outdoors · Mar 21 – Apr 4
Carrots, beetsSow outdoors · Mar 28 – Apr 11
TomatoesStart indoors · Feb 21 – Mar 7
TomatoesTransplant · Apr 25 – May 9
Peppers, eggplantStart indoors · Feb 7 – Feb 21
Peppers, eggplantTransplant · May 2 – May 16
BeansSow outdoors · Apr 25 – May 9
Sweet cornSow outdoors · Apr 25 – May 9
Cucumbers, squashSow outdoors · Apr 25 – May 9
Fall lettuce, spinachSow outdoors · Aug 29 – Sep 12
GarlicPlant cloves · Oct 10 – Nov 14
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 18) and first fall frost (Oct 24) 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 42528 came on Mar 2 — 3 days earlier than the 1991–2020 average (Mar 5).

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.

Trees 78

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 109

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 holly40 ft · blooms mid spring · low shade tolerance · to −20 °F

Wildflowers & perennials 181

American bur-reed3 ft · blooms indeterminate · medium shade tolerance · to −33 °FAmerican eelgrass1 ft · blooms mid summer · high shade tolerance · to −33 °FAmerican lotus3 ft · blooms mid summer · high shade tolerance · to −36 °FAmerican pokeweed7 ft · blooms mid summer · low shade tolerance · to −33 °FAmerican speedwell0.8 ft · blooms mid summer · low shade tolerance · to −38 °FAmerican spongeplant0.5 ft · blooms mid spring · high shade tolerance · to −24 °F

Grasses 153

autumn bluegrass1.5 ft · blooms late spring · medium shade tolerance · to −8 °Fawlfruit sedge4 ft · blooms mid spring · low shade tolerance · to −38 °FBailey's sedge2.1 ft · blooms late spring · low shade tolerance · to −33 °Fbig bluestem6 ft · blooms summer · high shade tolerance · to −46 °Fblister sedge3 ft · blooms late spring · medium shade tolerance · to −38 °Fbluejoint5 ft · blooms late spring · high shade tolerance · to −33 °F

Vines 14

American bittersweet15 ft · blooms spring · low shade tolerance · to −38 °FAmerican wisteria50 ft · blooms spring · low shade tolerance · to −3 °Fcatbird grape30 ft · blooms late spring · medium shade tolerance · to −13 °Fcupseed30 ft · blooms late spring · low shade tolerance · to −3 °Fdevil's darning needles15 ft · blooms mid summer · medium shade tolerance · to −38 °Ffrost grape83 ft · blooms late spring · medium shade tolerance · to −23 °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 Dunnville, KY.

Soil in Dunnville, KY

The soil mapped at the center of ZIP 42528 is Frankstown — silt loam, well drained.

TextureSilt loama good balance for most vegetables
pH5.6moderately acidic; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter2.5%moderate
Hydrologic groupBwater soaks in moderately
Farmland classFarmland of statewide importanceUSDA classification

Map unit: Frankstown silt loam, 6 to 12 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 42528; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Dunnville, KY

Summer high86 °Faverage high, July
Winter low25 °Faverage low, January
Hot days25days a year at 90 °F or more
Freezing nights111nights a year at 32 °F or less
Growing degree days3,803base 50 °F — the season’s usable heat
Longest day14 h 43 mindaylight on June 21
Shortest day9 h 36 mindaylight on December 21
Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully
Precipitation53.5 inper year, rain and melted snow
Snowfall14 inper year

Average high and low, by month

10°20°30°40°50°60°70°80°90°100°32 °FJanuary: average high 44 °F, low 25 °F 44°25° JanFebruary: average high 48 °F, low 27 °F 48°27° FebMarch: average high 57 °F, low 34 °F 57°34° MarApril: average high 68 °F, low 42 °F 68°42° AprMay: average high 75 °F, low 53 °F 75°53° MayJune: average high 83 °F, low 61 °F 83°61° JunJuly: average high 86 °F, low 65 °F 86°65° JulAugust: average high 85 °F, low 64 °F 85°64° AugSeptember: average high 79 °F, low 56 °F 79°56° SepOctober: average high 69 °F, low 45 °F 69°45° OctNovember: average high 57 °F, low 34 °F 57°34° NovDecember: average high 47 °F, low 29 °F 47°29° Dec

Precipitation by month inches · ❄ = snowfall

0″2″4″6″January: 3.94 in precipitation, 4.3 in snowfall 3.9❄4 JanFebruary: 4.16 in precipitation, 3.4 in snowfall 4.2❄3 FebMarch: 5.25 in precipitation, 2.5 in snowfall 5.3❄3 MarApril: 4.57 in precipitation 4.6 AprMay: 6.19 in precipitation 6.2 MayJune: 5.06 in precipitation 5.1 JunJuly: 4.60 in precipitation 4.6 JulAugust: 3.77 in precipitation 3.8 AugSeptember: 4.22 in precipitation 4.2 SepOctober: 3.93 in precipitation 3.9 OctNovember: 3.45 in precipitation, 0.1 in snowfall 3.5 NovDecember: 4.39 in precipitation, 3.6 in snowfall 4.4❄4 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Jamestown Wwtp, KY (12 mi away); precipitation: Liberty, KY (7 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 7a.

425657a
Windsor, KY · 7 mi
427537a
Knifley, KY · 8 mi
426427a
Russell Springs, KY · 9 mi
425397a
Liberty, KY · 10 mi
425167a
Bethelridge, KY · 13 mi
427337a
Elk Horn, KY · 14 mi
425667a
Yosemite, KY · 15 mi
427287a
Columbia, KY · 15 mi

Kentucky planting zones →

Questions about 42528

What planting zone is ZIP code 42528?

ZIP code 42528 (Dunnville, 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 Dunnville, KY?

The median last spring frost (32 °F) near 42528 is April 18; after May 3 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Jamestown Wwtp station.

When is the first frost in Dunnville, KY?

The median first fall frost near 42528 is October 24, giving a median frost-free growing season of 189 days.

When should I plant tomatoes in 42528?

Start tomato seeds indoors around Feb 21 – Mar 7 and set transplants outside around Apr 25 – May 9, one to three weeks after the median last frost.

How much rain and snow does 42528 get?

About 53.5 inches of precipitation a year and 14 inches of snowfall (NOAA 1991–2020 normals, Liberty station).

How hot do summers get in Dunnville, KY?

The average high peaks at 86 °F in July, with about 25 days a year at 90 °F or more.

What kind of soil does 42528 have?

The USDA soil survey maps Frankstown at the center of ZIP 42528: silt loam, well drained, pH about 5.6 (moderately acidic).

Did spring come early in Dunnville, KY in 2026?

Spring leaf-out near 42528 came on Mar 2 in 2026, 3 days earlier than the 1991–2020 average (Mar 5), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Dunnville, KY?

Intermediate onions: the longest day near 42528 is 14 h 43 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Did the zone for 42528 change?

Yes. The 2012 USDA map put 42528 in zone 6b; the 2023 map puts it in zone 7a. The newer map uses 1991–2020 data and more weather stations.