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

Planting zone for 66404 — Baileyville, KS

ZIP code 66404 (Baileyville, Nemaha County) is in USDA zone 6a: the coldest winter night averages −10 to −5 °F. The median last spring frost is April 22 and the first fall frost October 13.

Where ZIP 66404 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.

Zone6a−10 to −5 °F
Coldest night−23.3 to −20.6 °C
Last frostApr 22
First frostOct 13
2012 zone5b

Was 5b 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 6a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Baileyville, KS…

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 Baileyville, KS

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 2only 10% chance of frost after
First fall frostOctober 13median — 10% chance by Sep 27
Growing season173 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 14 and returns around October 23.

From the NOAA station Baileyville, KS — 2 miles away, elevation 1,296 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 66404

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 18 – Sep 1
GarlicPlant cloves · Sep 29 – Nov 3
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 22) and first fall frost (Oct 13) 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 66404 came on Mar 7 — 17 days earlier than the 1991–2020 average (Mar 24).

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).

Soil in Baileyville, KS

The soil mapped at the center of ZIP 66404 is Pawnee — clay loam, moderately well drained.

TextureClay loamholds water and nutrients; slow to drain and warm up
pH5.6moderately acidic; most vegetables like 6.0–7.0
DrainageModerately well drainednatural drainage class
Organic matter2%moderate
Hydrologic groupDwater soaks in very slowly
Farmland classFarmland of statewide importanceUSDA classification

Map unit: Pawnee clay loam, 4 to 8 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 66404; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Baileyville, KS

Summer high87 °Faverage high, July
Winter low15 °Faverage low, January
Hot days32days a year at 90 °F or more
Freezing nights139nights a year at 32 °F or less
Growing degree days3,476base 50 °F — the season’s usable heat
Longest day15 h 00 mindaylight on June 21
Shortest day9 h 20 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation30.5 inper year, rain and melted snow

Average high and low, by month

0°10°20°30°40°50°60°70°80°90°100°32 °FJanuary: average high 35 °F, low 15 °F 35°15° JanFebruary: average high 39 °F, low 18 °F 39°18° FebMarch: average high 53 °F, low 29 °F 53°29° MarApril: average high 63 °F, low 39 °F 63°39° AprMay: average high 73 °F, low 52 °F 73°52° MayJune: average high 83 °F, low 62 °F 83°62° JunJuly: average high 87 °F, low 65 °F 87°65° JulAugust: average high 85 °F, low 63 °F 85°63° AugSeptember: average high 78 °F, low 53 °F 78°53° SepOctober: average high 66 °F, low 41 °F 66°41° OctNovember: average high 51 °F, low 29 °F 51°29° NovDecember: average high 39 °F, low 20 °F 39°20° Dec

Precipitation by month inches

0″1″2″3″4″5″January: 0.62 in precipitation 0.6 JanFebruary: 0.98 in precipitation 1.0 FebMarch: 2.14 in precipitation 2.1 MarApril: 3.16 in precipitation 3.2 AprMay: 4.35 in precipitation 4.3 MayJune: 3.98 in precipitation 4.0 JunJuly: 3.69 in precipitation 3.7 JulAugust: 3.36 in precipitation 3.4 AugSeptember: 2.51 in precipitation 2.5 SepOctober: 2.56 in precipitation 2.6 OctNovember: 1.78 in precipitation 1.8 NovDecember: 1.33 in precipitation 1.3 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Baileyville, KS (2 mi away); precipitation: Baileyville, KS (2 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 6a.

664036a
Axtell, KS · 5 mi
665386a
Seneca, KS · 7 mi
664086a
Bern, KS · 12 mi
665416a
Summerfield, KS · 12 mi
664156a
Centralia, KS · 12 mi
665226a
Oneida, KS · 12 mi
665446a
Vermillion, KS · 13 mi
664066a
Beattie, KS · 13 mi

Kansas planting zones →

Questions about 66404

What planting zone is ZIP code 66404?

ZIP code 66404 (Baileyville, KS) is in USDA hardiness zone 6a on the 2023 map: the coldest night of an average winter reaches −10 to −5 °F (−23.3 to −20.6 °C).

When is the last frost in Baileyville, KS?

The median last spring frost (32 °F) near 66404 is April 22; after May 2 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Baileyville station.

When is the first frost in Baileyville, KS?

The median first fall frost near 66404 is October 13, giving a median frost-free growing season of 173 days.

When should I plant tomatoes in 66404?

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 66404 get?

About 30.5 inches of precipitation a year (NOAA 1991–2020 normals, Baileyville station).

How hot do summers get in Baileyville, KS?

The average high peaks at 87 °F in July, with about 32 days a year at 90 °F or more.

What kind of soil does 66404 have?

The USDA soil survey maps Pawnee at the center of ZIP 66404: clay loam, moderately well drained, pH about 5.6 (moderately acidic).

Did spring come early in Baileyville, KS in 2026?

Spring leaf-out near 66404 came on Mar 7 in 2026, 17 days earlier than the 1991–2020 average (Mar 24), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Baileyville, KS?

Long-day onions: the longest day near 66404 is 15 h 00 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 66404 change?

Yes. The 2012 USDA map put 66404 in zone 5b; the 2023 map puts it in zone 6a. The newer map uses 1991–2020 data and more weather stations.