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

Planting zone for 64672 — Powersville, MO

ZIP code 64672 (Powersville, Putnam County) is in USDA zone 5b: the coldest winter night averages −15 to −10 °F. The median last spring frost is April 21 and the first fall frost October 19.

Where ZIP 64672 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.

Zone5b−15 to −10 °F
Coldest night−26.1 to −23.3 °C
Last frostApr 21
First frostOct 19
2012 zone5b

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 5b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Powersville, 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 Powersville, MO

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 21median — 50% chance of a later frost
Safe for tender plantsMay 6only 10% chance of frost after
First fall frostOctober 19median — 10% chance by Oct 3
Growing season178 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 11 and returns around October 27.

From the NOAA station Allerton, IA — 13 miles away, elevation 1,089 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 64672

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 10 – Mar 24
SpinachSow outdoors · Mar 10 – Mar 31
Broccoli, cabbageStart indoors · Feb 10 – Feb 24
Broccoli, cabbageTransplant · Mar 31 – Apr 14
Onion setsPlant outdoors · Mar 24 – Apr 7
PotatoesPlant outdoors · Mar 31 – Apr 14
LettuceSow outdoors · Mar 24 – Apr 7
Carrots, beetsSow outdoors · Mar 31 – Apr 14
TomatoesStart indoors · Feb 24 – Mar 10
TomatoesTransplant · Apr 28 – May 12
Peppers, eggplantStart indoors · Feb 10 – Feb 24
Peppers, eggplantTransplant · May 5 – May 19
BeansSow outdoors · Apr 28 – May 12
Sweet cornSow outdoors · Apr 28 – May 12
Cucumbers, squashSow outdoors · Apr 28 – May 12
Fall lettuce, spinachSow outdoors · Aug 24 – Sep 7
GarlicPlant cloves · Oct 5 – Nov 9
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 21) and first fall frost (Oct 19) 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 64672 came on Mar 11 — 20 days earlier than the 1991–2020 average (Mar 31).

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 5b in Missouri

491 plants native to the lower 48 states, recorded in Missouri, and rated by the USDA to survive −15 °F or colder — the bottom of zone 5b. Each links to its USDA PLANTS profile.

Trees 66

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 78

alternateleaf 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 °FAmerican hornbeam30 ft · blooms mid spring · low shade tolerance · to −34 °FAmerican plum24 ft · blooms mid spring · high shade tolerance · to −38 °F

Wildflowers & perennials 181

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 149

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 8

American bittersweet15 ft · blooms spring · low shade tolerance · to −38 °Fdevil's darning needles15 ft · blooms mid summer · medium shade tolerance · to −38 °Ffrost grape83 ft · blooms late spring · medium shade tolerance · to −23 °Fmuscadine30 ft · blooms late spring · medium shade tolerance · to −18 °Friverbank grape45 ft · blooms late spring · medium shade tolerance · to −33 °Fsummer grape30 ft · blooms late spring · low 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 Powersville, MO.

Soil in Powersville, MO

The soil mapped at the center of ZIP 64672 is Clarinda — silty clay loam, poorly drained.

TextureSilty clay loamholds water and nutrients; slow to drain and warm up
pH6.2slightly acidic; most vegetables like 6.0–7.0
DrainagePoorly drainedconsider raised beds
Organic matter2.5%moderate
Hydrologic groupDwater soaks in very slowly
Farmland classNot prime farmlandUSDA classification

Map unit: Clarinda silty clay loam, 5 to 9 percent slopes, moderately 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 64672; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Powersville, MO

Summer high85 °Faverage high, July
Winter low13 °Faverage low, January
Hot days16days a year at 90 °F or more
Freezing nights141nights a year at 32 °F or less
Growing degree days3,188base 50 °F — the season’s usable heat
Longest day15 h 04 mindaylight on June 21
Shortest day9 h 16 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation41.3 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 32 °F, low 13 °F 32°13° JanFebruary: average high 37 °F, low 17 °F 37°17° FebMarch: average high 49 °F, low 28 °F 49°28° MarApril: average high 62 °F, low 38 °F 62°38° AprMay: average high 71 °F, low 50 °F 71°50° MayJune: average high 80 °F, low 60 °F 80°60° JunJuly: average high 85 °F, low 64 °F 85°64° JulAugust: average high 83 °F, low 62 °F 83°62° AugSeptember: average high 76 °F, low 54 °F 76°54° SepOctober: average high 64 °F, low 41 °F 64°41° OctNovember: average high 49 °F, low 28 °F 49°28° NovDecember: average high 37 °F, low 19 °F 37°19° Dec

Precipitation by month inches

0″1″2″3″4″5″6″January: 1.35 in precipitation 1.4 JanFebruary: 1.73 in precipitation 1.7 FebMarch: 2.49 in precipitation 2.5 MarApril: 4.01 in precipitation 4.0 AprMay: 5.65 in precipitation 5.7 MayJune: 5.52 in precipitation 5.5 JunJuly: 4.52 in precipitation 4.5 JulAugust: 4.83 in precipitation 4.8 AugSeptember: 4.08 in precipitation 4.1 SepOctober: 3.16 in precipitation 3.2 OctNovember: 2.20 in precipitation 2.2 NovDecember: 1.80 in precipitation 1.8 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Allerton, IA (13 mi away); precipitation: Unionville 0.8 W, MO (13 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 5b.

646555b
Lucerne, MO · 6 mi
525905b
Seymour, IA · 10 mi
646675b
Newtown, MO · 11 mi
500085b
Allerton, IA · 12 mi
500525b
Clio, IA · 13 mi
635605b
Pollock, MO · 14 mi
500605b
Corydon, IA · 15 mi
635655b
Unionville, MO · 16 mi

Missouri planting zones →

Questions about 64672

What planting zone is ZIP code 64672?

ZIP code 64672 (Powersville, MO) is in USDA hardiness zone 5b on the 2023 map: the coldest night of an average winter reaches −15 to −10 °F (−26.1 to −23.3 °C).

When is the last frost in Powersville, MO?

The median last spring frost (32 °F) near 64672 is April 21; after May 6 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Allerton station.

When is the first frost in Powersville, MO?

The median first fall frost near 64672 is October 19, giving a median frost-free growing season of 178 days.

When should I plant tomatoes in 64672?

Start tomato seeds indoors around Feb 24 – Mar 10 and set transplants outside around Apr 28 – May 12, one to three weeks after the median last frost.

How much rain and snow does 64672 get?

About 41.3 inches of precipitation a year (NOAA 1991–2020 normals, Unionville 0.8 W station).

How hot do summers get in Powersville, MO?

The average high peaks at 85 °F in July, with about 16 days a year at 90 °F or more.

What kind of soil does 64672 have?

The USDA soil survey maps Clarinda at the center of ZIP 64672: silty clay loam, poorly drained, pH about 6.2 (slightly acidic).

Did spring come early in Powersville, MO in 2026?

Spring leaf-out near 64672 came on Mar 11 in 2026, 20 days earlier than the 1991–2020 average (Mar 31), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Powersville, MO?

Long-day onions: the longest day near 64672 is 15 h 04 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).