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

Planting zone for 64079 — Platte City, MO

ZIP code 64079 (Platte City, Platte County) is in USDA zone 6b: the coldest winter night averages −5 to 0 °F. The median last spring frost is April 13 and the first fall frost October 24.

Where ZIP 64079 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 13

First frostOct 24

2012 zone6a

Was 6a 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 6b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Platte City, 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 Platte City, MO

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostApril 13median — 50% chance of a later frost

Safe for tender plantsApril 29only 10% chance of frost after

First fall frostOctober 24median — 10% chance by Oct 9

Growing season193 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 1 and returns around November 1.

From the NOAA station Kansas City Intl Airport, MO — 6 miles away, elevation 1,004 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 64079

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Mar 2 – Mar 16

SpinachSow outdoors · Mar 2 – Mar 23

Broccoli, cabbageStart indoors · Feb 2 – Feb 16

Broccoli, cabbageTransplant · Mar 23 – Apr 6

Onion setsPlant outdoors · Mar 16 – Mar 30

PotatoesPlant outdoors · Mar 23 – Apr 6

LettuceSow outdoors · Mar 16 – Mar 30

Carrots, beetsSow outdoors · Mar 23 – Apr 6

TomatoesStart indoors · Feb 16 – Mar 2

TomatoesTransplant · Apr 20 – May 4

Peppers, eggplantStart indoors · Feb 2 – Feb 16

Peppers, eggplantTransplant · Apr 27 – May 11

BeansSow outdoors · Apr 20 – May 4

Sweet cornSow outdoors · Apr 20 – May 4

Cucumbers, squashSow outdoors · Apr 20 – May 4

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 13) 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 64079 came on Feb 25 — 22 days earlier than the 1991–2020 average (Mar 19).

average
Mar 192026
Feb 25

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 Platte City, MO

The soil mapped at the center of ZIP 64079 is Knox — silty clay loam, well drained.

TextureSilty clay loamholds water and nutrients; slow to drain and warm up

pH6.5neutral; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter1.5%low — add compost

Hydrologic groupBwater soaks in moderately

Farmland classNot prime farmlandUSDA classification

Map unit: Knox silty clay loam, 14 to 20 percent slopes, severely 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 64079; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Platte City, MO

Summer high88 °Faverage high, July

Winter low20 °Faverage low, January

Hot days36days a year at 90 °F or more

Freezing nights107nights a year at 32 °F or less

Growing degree days4,025base 50 °F — the season’s usable heat

Longest day14 h 57 mindaylight on June 21

Shortest day9 h 23 mindaylight on December 21

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

Precipitation39.9 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: Kansas City Intl Airport, MO (6 mi away); precipitation: Platte City 0.3 Ene, MO (within 1 mile). Daylight is calculated from latitude.

Nearby ZIP codes

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

641686b

Kansas City, MO · 3 mi

641906b

Kansas City, MO · 3 mi

641956b

Kansas City, MO · 3 mi

641636b

Kansas City, MO · 6 mi

640286b

Farley, MO · 6 mi

660276b

Fort Leavenworth, KS · 7 mi

641536b

Kansas City, MO · 7 mi

640186a

Camden Point, MO · 7 mi

Missouri planting zones →

Questions about 64079

What planting zone is ZIP code 64079?

ZIP code 64079 (Platte City, 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 Platte City, MO?

The median last spring frost (32 °F) near 64079 is April 13; after April 29 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Kansas City Intl Airport station.

When is the first frost in Platte City, MO?

The median first fall frost near 64079 is October 24, giving a median frost-free growing season of 193 days.

When should I plant tomatoes in 64079?

Start tomato seeds indoors around Feb 16 – Mar 2 and set transplants outside around Apr 20 – May 4, one to three weeks after the median last frost.

How much rain and snow does 64079 get?

About 39.9 inches of precipitation a year (NOAA 1991–2020 normals, Platte City 0.3 Ene station).

How hot do summers get in Platte City, 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 64079 have?

The USDA soil survey maps Knox at the center of ZIP 64079: silty clay loam, well drained, pH about 6.5 (neutral).

Did spring come early in Platte City, MO in 2026?

Spring leaf-out near 64079 came on Feb 25 in 2026, 22 days earlier than the 1991–2020 average (Mar 19), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Platte City, MO?

Intermediate onions: the longest day near 64079 is 14 h 57 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Did the zone for 64079 change?

Yes. The 2012 USDA map put 64079 in zone 6a; the 2023 map puts it in zone 6b. The newer map uses 1991–2020 data and more weather stations.