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

Planting zone for 78364 — Kingsville, TX

ZIP code 78364 (Kingsville, Kleberg County) is in USDA zone 9b: the coldest winter night averages 25 to 30 °F. The median last spring frost is January 25 and the first fall frost December 20.

Where ZIP 78364 is

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.

Zone9b25 to 30 °F

Coldest night−3.9 to −1.1 °C

Last frostJan 25

First frostDec 20

2012 zone9a

Was 9a 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 9b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Kingsville, TX…

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 Kingsville, TX

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostJanuary 25median — 50% chance of a later frost

Safe for tender plantsMarch 3only 10% chance of frost after

First fall frostDecember 20median — 10% chance by Nov 25

Growing season329 daysfrost-free, median

A hard freeze (28 °F) usually ends around January 9 and returns around January 1.

From the NOAA station Kingsville, TX — within 1 mile, elevation 56 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 78364

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Dec 14 – Dec 28

SpinachSow outdoors · Dec 14 – Jan 4

Broccoli, cabbageStart indoors · Nov 16 – Nov 30

Broccoli, cabbageTransplant · Jan 4 – Jan 18

Onion setsPlant outdoors · Dec 28 – Jan 11

PotatoesPlant outdoors · Jan 4 – Jan 18

LettuceSow outdoors · Dec 28 – Jan 11

Carrots, beetsSow outdoors · Jan 4 – Jan 18

TomatoesStart indoors · Nov 30 – Dec 14

TomatoesTransplant · Feb 1 – Feb 15

Peppers, eggplantStart indoors · Nov 16 – Nov 30

Peppers, eggplantTransplant · Feb 8 – Feb 22

BeansSow outdoors · Feb 1 – Feb 15

Sweet cornSow outdoors · Feb 1 – Feb 15

Cucumbers, squashSow outdoors · Feb 1 – Feb 15

Fall lettuce, spinachSow outdoors · Oct 25 – Nov 8

GarlicPlant cloves · Dec 6 – Jan 10

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Jan 25) and first fall frost (Dec 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 78364 came on Jan 10 — 9 days earlier than the 1991–2020 average (Jan 19).

average
Jan 192026
Jan 10

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 9b in Texas

646 plants native to the lower 48 states, recorded in Texas, and rated by the USDA to survive 25 °F or colder — the bottom of zone 9b. 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 Kingsville, TX.

Soil in Kingsville, TX

The soil mapped at the center of ZIP 78364 is Gertrudis — fine sandy loam, well drained.

TextureFine sandy loamdrains and warms fast; dries out and needs more feeding

pH8.2alkaline; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter2%moderate

Hydrologic groupBwater soaks in moderately

Farmland classPrime farmland if irrigatedUSDA classification

Map unit: Gertrudis fine sandy loam, 0 to 3 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 78364; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Kingsville, TX

Summer high97 °Faverage high, August

Winter low47 °Faverage low, January

Hot days145days a year at 90 °F or more

Freezing nights5nights a year at 32 °F or less

Growing degree days8,610base 50 °F — the season’s usable heat

Longest day13 h 53 mindaylight on June 21

Shortest day10 h 24 mindaylight on December 21

Onions to growShort-daysummer days stay under about 14 h 20 min, so long-day varieties won’t bulb

Precipitation30.9 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: Kingsville, TX (within 1 mile); precipitation: Kingsville, TX (within 1 mile). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 9b.

783639b

Kingsville, TX · 5 mi

Agua Dulce, TX · 17 mi

All 2 ZIP codes in Kingsville → · Texas planting zones →

Questions about 78364

What planting zone is ZIP code 78364?

ZIP code 78364 (Kingsville, TX) is in USDA hardiness zone 9b on the 2023 map: the coldest night of an average winter reaches 25 to 30 °F (−3.9 to −1.1 °C).

When is the last frost in Kingsville, TX?

The median last spring frost (32 °F) near 78364 is January 25; after March 3 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Kingsville station.

When is the first frost in Kingsville, TX?

The median first fall frost near 78364 is December 20, giving a median frost-free growing season of 329 days.

When should I plant tomatoes in 78364?

Start tomato seeds indoors around Nov 30 – Dec 14 and set transplants outside around Feb 1 – Feb 15, one to three weeks after the median last frost.

How much rain and snow does 78364 get?

About 30.9 inches of precipitation a year (NOAA 1991–2020 normals, Kingsville station).

How hot do summers get in Kingsville, TX?

The average high peaks at 97 °F in August, with about 145 days a year at 90 °F or more.

What kind of soil does 78364 have?

The USDA soil survey maps Gertrudis at the center of ZIP 78364: fine sandy loam, well drained, pH about 8.2 (alkaline).

Did spring come early in Kingsville, TX in 2026?

Spring leaf-out near 78364 came on Jan 10 in 2026, 9 days earlier than the 1991–2020 average (Jan 19), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Kingsville, TX?

Short-day onions: the longest day near 78364 is 13 h 53 min, so summer days stay under about 14 h 20 min, so long-day varieties won’t bulb.

Did the zone for 78364 change?

Yes. The 2012 USDA map put 78364 in zone 9a; the 2023 map puts it in zone 9b. The newer map uses 1991–2020 data and more weather stations.