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

Planting zone for 64454 — Gower, MO

ZIP code 64454 (Gower, Clinton County) is in USDA zone 6a: the coldest winter night averages −10 to −5 °F. The median last spring frost is April 18 and the first fall frost October 20.

Where ZIP 64454 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 18
First frostOct 20
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 Gower, 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 Gower, MO

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 18median — 50% chance of a later frost
Safe for tender plantsMay 3only 10% chance of frost after
First fall frostOctober 20median — 10% chance by Oct 5
Growing season183 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 7 and returns around October 29.

From the NOAA station Smithville Lake, MO — 15 miles away, elevation 906 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 64454

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 7 – Mar 21
SpinachSow outdoors · Mar 7 – Mar 28
Broccoli, cabbageStart indoors · Feb 7 – Feb 21
Broccoli, cabbageTransplant · Mar 28 – Apr 11
Onion setsPlant outdoors · Mar 21 – Apr 4
PotatoesPlant outdoors · Mar 28 – Apr 11
LettuceSow outdoors · Mar 21 – Apr 4
Carrots, beetsSow outdoors · Mar 28 – Apr 11
TomatoesStart indoors · Feb 21 – Mar 7
TomatoesTransplant · Apr 25 – May 9
Peppers, eggplantStart indoors · Feb 7 – Feb 21
Peppers, eggplantTransplant · May 2 – May 16
BeansSow outdoors · Apr 25 – May 9
Sweet cornSow outdoors · Apr 25 – May 9
Cucumbers, squashSow outdoors · Apr 25 – May 9
Fall lettuce, spinachSow outdoors · Aug 25 – Sep 8
GarlicPlant cloves · Oct 6 – Nov 10
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 18) and first fall frost (Oct 20) 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 64454 came on Mar 4 — 18 days earlier than the 1991–2020 average (Mar 22).

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 Gower, MO

The soil mapped at the center of ZIP 64454 is Marshall — silty clay loam, well drained.

TextureSilty clay loamholds water and nutrients; slow to drain and warm up
pH5.9moderately acidic; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter3.3%moderate
Hydrologic groupCwater soaks in slowly
Farmland classprime farmlandUSDA classification

Map unit: Marshall silty clay loam, 2 to 5 percent slopes.

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 64454; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Gower, MO

Summer high87 °Faverage high, July
Winter low16 °Faverage low, January
Hot days30days a year at 90 °F or more
Freezing nights119nights a year at 32 °F or less
Growing degree days3,705base 50 °F — the season’s usable heat
Longest day14 h 58 mindaylight on June 21
Shortest day9 h 22 mindaylight on December 21
Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully
Precipitation38.9 inper year, rain and melted snow

Average high and low, by month

10°20°30°40°50°60°70°80°90°100°32 °FJanuary: average high 36 °F, low 16 °F 36°16° JanFebruary: average high 42 °F, low 21 °F 42°21° FebMarch: average high 53 °F, low 31 °F 53°31° MarApril: average high 64 °F, low 41 °F 64°41° AprMay: average high 73 °F, low 53 °F 73°53° MayJune: average high 82 °F, low 63 °F 82°63° JunJuly: average high 87 °F, low 68 °F 87°68° JulAugust: average high 85 °F, low 66 °F 85°66° AugSeptember: average high 78 °F, low 56 °F 78°56° SepOctober: average high 66 °F, low 44 °F 66°44° OctNovember: average high 53 °F, low 31 °F 53°31° NovDecember: average high 42 °F, low 22 °F 42°22° Dec

Precipitation by month inches

0″1″2″3″4″5″6″January: 1.25 in precipitation 1.3 JanFebruary: 1.55 in precipitation 1.6 FebMarch: 2.70 in precipitation 2.7 MarApril: 3.72 in precipitation 3.7 AprMay: 5.69 in precipitation 5.7 MayJune: 4.47 in precipitation 4.5 JunJuly: 4.26 in precipitation 4.3 JulAugust: 4.38 in precipitation 4.4 AugSeptember: 4.14 in precipitation 4.1 SepOctober: 3.05 in precipitation 3.0 OctNovember: 2.02 in precipitation 2.0 NovDecember: 1.64 in precipitation 1.6 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Smithville Lake, MO (15 mi away); precipitation: Plattsburg 0.6 W, MO (7 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 6a.

644016a
Agency, MO · 7 mi
644776a
Plattsburg, MO · 8 mi
644446a
Edgerton, MO · 9 mi
644926a
Trimble, MO · 9 mi
644436a
Easton, MO · 10 mi
644906a
Stewartsville, MO · 10 mi
644396a
Dearborn, MO · 10 mi
645076a
Saint Joseph, MO · 12 mi

Missouri planting zones →

Questions about 64454

What planting zone is ZIP code 64454?

ZIP code 64454 (Gower, MO) 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 Gower, MO?

The median last spring frost (32 °F) near 64454 is April 18; after May 3 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Smithville Lake station.

When is the first frost in Gower, MO?

The median first fall frost near 64454 is October 20, giving a median frost-free growing season of 183 days.

When should I plant tomatoes in 64454?

Start tomato seeds indoors around Feb 21 – Mar 7 and set transplants outside around Apr 25 – May 9, one to three weeks after the median last frost.

How much rain and snow does 64454 get?

About 38.9 inches of precipitation a year (NOAA 1991–2020 normals, Plattsburg 0.6 W station).

How hot do summers get in Gower, MO?

The average high peaks at 87 °F in July, with about 30 days a year at 90 °F or more.

What kind of soil does 64454 have?

The USDA soil survey maps Marshall at the center of ZIP 64454: silty clay loam, well drained, pH about 5.9 (moderately acidic).

Did spring come early in Gower, MO in 2026?

Spring leaf-out near 64454 came on Mar 4 in 2026, 18 days earlier than the 1991–2020 average (Mar 22), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Gower, MO?

Intermediate onions: the longest day near 64454 is 14 h 58 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Did the zone for 64454 change?

Yes. The 2012 USDA map put 64454 in zone 5b; the 2023 map puts it in zone 6a. The newer map uses 1991–2020 data and more weather stations.