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

Planting zone for 63855 — Hornersville, MO

ZIP code 63855 (Hornersville, Dunklin County) is in USDA zone 8a: the coldest winter night averages 10 to 15 °F. The median last spring frost is March 31 and the first fall frost November 1.

Where ZIP 63855 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.

Zone8a10 to 15 °F
Coldest night−12.2 to −9.4 °C
Last frostMar 31
First frostNov 1
2012 zone7b

Was 7b 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 8a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Hornersville, MO…

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 Hornersville, MO

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMarch 31median — 50% chance of a later frost
Safe for tender plantsApril 15only 10% chance of frost after
First fall frostNovember 1median — 10% chance by Oct 18
Growing season215 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 19 and returns around November 13.

From the NOAA station Kennett Radio Kboa, MO — 11 miles away, elevation 269 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 63855

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Feb 17 – Mar 3
SpinachSow outdoors · Feb 17 – Mar 10
Broccoli, cabbageStart indoors · Jan 20 – Feb 3
Broccoli, cabbageTransplant · Mar 10 – Mar 24
Onion setsPlant outdoors · Mar 3 – Mar 17
PotatoesPlant outdoors · Mar 10 – Mar 24
LettuceSow outdoors · Mar 3 – Mar 17
Carrots, beetsSow outdoors · Mar 10 – Mar 24
TomatoesStart indoors · Feb 3 – Feb 17
TomatoesTransplant · Apr 7 – Apr 21
Peppers, eggplantStart indoors · Jan 20 – Feb 3
Peppers, eggplantTransplant · Apr 14 – Apr 28
BeansSow outdoors · Apr 7 – Apr 21
Sweet cornSow outdoors · Apr 7 – Apr 21
Cucumbers, squashSow outdoors · Apr 7 – Apr 21
Fall lettuce, spinachSow outdoors · Sep 6 – Sep 20
GarlicPlant cloves · Oct 18 – Nov 22
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Mar 31) and first fall frost (Nov 1) 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 63855 came on Feb 20 — 6 days earlier than the 1991–2020 average (Feb 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).

Native plants for zone 8a in Missouri

547 plants native to the lower 48 states, recorded in Missouri, and rated by the USDA to survive 10 °F or colder — the bottom of zone 8a. Each links to its USDA PLANTS profile.

Trees 73

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 °Fbald cypress130 ft · blooms mid spring · medium shade tolerance · to −18 °F

Shrubs 85

alternateleaf dogwood25 ft · blooms mid spring · low shade tolerance · to −47 °FAmerican beautyberry6 ft · blooms early summer · medium shade tolerance · to −8 °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 °FAmerican hornbeam30 ft · blooms mid spring · low shade tolerance · to −34 °F

Wildflowers & perennials 197

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 167

alkali sacaton3 ft · blooms mid summer · high shade tolerance · to −38 °FAmerican cupscale3 ft · blooms early summer · high shade tolerance · to −18 °Fawlfruit sedge4 ft · blooms mid spring · low shade tolerance · to −38 °FBicknell's sedge3 ft · blooms late spring · low shade tolerance · to −38 °Fbig bluestem6 ft · blooms summer · high shade tolerance · to −46 °Fblister sedge3 ft · blooms late spring · medium shade tolerance · to −38 °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 Hornersville, MO.

Soil in Hornersville, MO

The soil mapped at the center of ZIP 63855 is Sharkey — clay, poorly drained.

TextureClayholds water and nutrients; slow to drain and warm up
pH6.7neutral; most vegetables like 6.0–7.0
DrainagePoorly drainedconsider raised beds
Organic matter4%moderate
Hydrologic groupDwater soaks in very slowly
Farmland classPrime farmland if drainedUSDA classification

Map unit: Sharkey-Steele complex, 0 to 1 percent slopes, rarely flooded.

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 63855; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Hornersville, MO

Summer high91 °Faverage high, July
Winter low27 °Faverage low, January
Hot days65days a year at 90 °F or more
Freezing nights84nights a year at 32 °F or less
Growing degree days4,883base 50 °F — the season’s usable heat
Longest day14 h 37 mindaylight on June 21
Shortest day9 h 42 mindaylight on December 21
Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully
Precipitation54 inper year, rain and melted snow
Snowfall4 inper year

Average high and low, by month

20°30°40°50°60°70°80°90°100°32 °FJanuary: average high 46 °F, low 27 °F 46°27° JanFebruary: average high 51 °F, low 30 °F 51°30° FebMarch: average high 61 °F, low 38 °F 61°38° MarApril: average high 72 °F, low 48 °F 72°48° AprMay: average high 81 °F, low 58 °F 81°58° MayJune: average high 89 °F, low 67 °F 89°67° JunJuly: average high 91 °F, low 70 °F 91°70° JulAugust: average high 91 °F, low 67 °F 91°67° AugSeptember: average high 85 °F, low 60 °F 85°60° SepOctober: average high 74 °F, low 47 °F 74°47° OctNovember: average high 60 °F, low 38 °F 60°38° NovDecember: average high 49 °F, low 30 °F 49°30° Dec

Precipitation by month inches · ❄ = snowfall

0″1″2″3″4″5″6″January: 3.87 in precipitation, 1.7 in snowfall 3.9❄2 JanFebruary: 4.09 in precipitation, 0.6 in snowfall 4.1❄1 FebMarch: 4.91 in precipitation, 0.6 in snowfall 4.9❄1 MarApril: 5.78 in precipitation 5.8 AprMay: 4.81 in precipitation 4.8 MayJune: 3.54 in precipitation 3.5 JunJuly: 5.42 in precipitation 5.4 JulAugust: 2.83 in precipitation 2.8 AugSeptember: 3.75 in precipitation 3.8 SepOctober: 4.26 in precipitation 4.3 OctNovember: 5.64 in precipitation 5.6 NovDecember: 5.05 in precipitation, 0.6 in snowfall 5.0❄1 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Kennett Radio Kboa, MO (11 mi away); precipitation: Hornersville, MO (6 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

638757b
Rives, MO · 3 mi
638497b
Gobler, MO · 6 mi
638767b
Senath, MO · 7 mi
723198a
Gosnell, AR · 9 mi
638218a
Arbyrd, MO · 10 mi
638538a
Holland, MO · 11 mi
638577b
Kennett, MO · 11 mi
638778a
Steele, MO · 12 mi

Missouri planting zones →

Questions about 63855

What planting zone is ZIP code 63855?

ZIP code 63855 (Hornersville, MO) is in USDA hardiness zone 8a on the 2023 map: the coldest night of an average winter reaches 10 to 15 °F (−12.2 to −9.4 °C).

When is the last frost in Hornersville, MO?

The median last spring frost (32 °F) near 63855 is March 31; after April 15 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Kennett Radio Kboa station.

When is the first frost in Hornersville, MO?

The median first fall frost near 63855 is November 1, giving a median frost-free growing season of 215 days.

When should I plant tomatoes in 63855?

Start tomato seeds indoors around Feb 3 – Feb 17 and set transplants outside around Apr 7 – Apr 21, one to three weeks after the median last frost.

How much rain and snow does 63855 get?

About 54 inches of precipitation a year and 4 inches of snowfall (NOAA 1991–2020 normals, Hornersville station).

How hot do summers get in Hornersville, MO?

The average high peaks at 91 °F in July, with about 65 days a year at 90 °F or more.

What kind of soil does 63855 have?

The USDA soil survey maps Sharkey at the center of ZIP 63855: clay, poorly drained, pH about 6.7 (neutral).

Did spring come early in Hornersville, MO in 2026?

Spring leaf-out near 63855 came on Feb 20 in 2026, 6 days earlier than the 1991–2020 average (Feb 26), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Hornersville, MO?

Intermediate onions: the longest day near 63855 is 14 h 37 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Did the zone for 63855 change?

Yes. The 2012 USDA map put 63855 in zone 7b; the 2023 map puts it in zone 8a. The newer map uses 1991–2020 data and more weather stations.