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

Planting zone for 65588 — Winona, MO

ZIP code 65588 (Winona, Shannon County) is in USDA zone 6b: the coldest winter night averages −5 to 0 °F. The median last spring frost is April 22 and the first fall frost October 18.

Where ZIP 65588 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.

Zone6b−5 to 0 °F

Coldest night−20.6 to −17.8 °C

Last frostApr 22

First frostOct 18

2012 zone6b

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 6b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Winona, 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 Winona, MO

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostApril 22median — 50% chance of a later frost

Safe for tender plantsMay 6only 10% chance of frost after

First fall frostOctober 18median — 10% chance by Oct 5

Growing season176 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 10 and returns around October 27.

From the NOAA station Winona 3 Sw, MO — 5 miles away, elevation 961 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 65588

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Mar 11 – Mar 25

SpinachSow outdoors · Mar 11 – Apr 1

Broccoli, cabbageStart indoors · Feb 11 – Feb 25

Broccoli, cabbageTransplant · Apr 1 – Apr 15

Onion setsPlant outdoors · Mar 25 – Apr 8

PotatoesPlant outdoors · Apr 1 – Apr 15

LettuceSow outdoors · Mar 25 – Apr 8

Carrots, beetsSow outdoors · Apr 1 – Apr 15

TomatoesStart indoors · Feb 25 – Mar 11

TomatoesTransplant · Apr 29 – May 13

Peppers, eggplantStart indoors · Feb 11 – Feb 25

Peppers, eggplantTransplant · May 6 – May 20

BeansSow outdoors · Apr 29 – May 13

Sweet cornSow outdoors · Apr 29 – May 13

Cucumbers, squashSow outdoors · Apr 29 – May 13

Fall lettuce, spinachSow outdoors · Aug 23 – Sep 6

GarlicPlant cloves · Oct 4 – Nov 8

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 22) and first fall frost (Oct 18) 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 65588 came on Feb 28 — 8 days earlier than the 1991–2020 average (Mar 8).

average
Mar 82026
Feb 28

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 6b in Missouri

525 plants native to the lower 48 states, recorded in Missouri, and rated by the USDA to survive −5 °F or colder — the bottom of zone 6b. 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 Winona, MO.

Soil in Winona, MO

The soil mapped at the center of ZIP 65588 is Midco — very gravelly loam, somewhat excessively drained.

TextureVery gravelly loama good balance for most vegetables

pH6.0slightly acidic; most vegetables like 6.0–7.0

DrainageSomewhat excessively drainednatural drainage class

Organic matter6%high

Hydrologic groupAwater soaks in fast

Farmland classNot prime farmlandUSDA classification

Map unit: Midco very gravelly loam, 1 to 3 percent slopes, occasionally 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 65588; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Winona, MO

Summer high88 °Faverage high, July

Winter low20 °Faverage low, January

Hot days36days a year at 90 °F or more

Freezing nights125nights a year at 32 °F or less

Growing degree days3,565base 50 °F — the season’s usable heat

Longest day14 h 42 mindaylight on June 21

Shortest day9 h 37 mindaylight on December 21

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

Precipitation50.5 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: Winona 3 Sw, MO (5 mi away); precipitation: Winona 3 Sw, MO (5 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

639416b

Fremont, MO · 9 mi

654386b

Birch Tree, MO · 12 mi

639656b

Van Buren, MO · 15 mi

Ellington, MO · 23 mi

655487a

Mountain View, MO · 23 mi

Missouri planting zones →

Questions about 65588

What planting zone is ZIP code 65588?

ZIP code 65588 (Winona, MO) is in USDA hardiness zone 6b on the 2023 map: the coldest night of an average winter reaches −5 to 0 °F (−20.6 to −17.8 °C).

When is the last frost in Winona, MO?

The median last spring frost (32 °F) near 65588 is April 22; after May 6 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Winona 3 Sw station.

When is the first frost in Winona, MO?

The median first fall frost near 65588 is October 18, giving a median frost-free growing season of 176 days.

When should I plant tomatoes in 65588?

Start tomato seeds indoors around Feb 25 – Mar 11 and set transplants outside around Apr 29 – May 13, one to three weeks after the median last frost.

How much rain and snow does 65588 get?

About 50.5 inches of precipitation a year (NOAA 1991–2020 normals, Winona 3 Sw station).

How hot do summers get in Winona, MO?

The average high peaks at 88 °F in July, with about 36 days a year at 90 °F or more.

What kind of soil does 65588 have?

The USDA soil survey maps Midco at the center of ZIP 65588: very gravelly loam, somewhat excessively drained, pH about 6.0 (slightly acidic).

Did spring come early in Winona, MO in 2026?

Spring leaf-out near 65588 came on Feb 28 in 2026, 8 days earlier than the 1991–2020 average (Mar 8), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Winona, MO?

Intermediate onions: the longest day near 65588 is 14 h 42 min, so day-neutral types bulb best; long-day varieties may not bulb fully.