Data: 2023 USDA zones (PRISM/OSU) · NOAA 1991–2020 normals · updated Oct 30, 2026

Planting zone for 78007 — Calliham, TX

ZIP code 78007 (Calliham, McMullen County) is in USDA zone 9b: the coldest winter night averages 25 to 30 °F. The median last spring frost is February 9 and the first fall frost December 8.

Where ZIP 78007 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.

Zone9b25 to 30 °F

Coldest night−3.9 to −1.1 °C

Last frostFeb 9

First frostDec 8

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 Calliham, 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 Calliham, TX

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostFebruary 9median — 50% chance of a later frost

Safe for tender plantsMarch 7only 10% chance of frost after

First fall frostDecember 8median — 10% chance by Nov 16

Growing season303 daysfrost-free, median

A hard freeze (28 °F) usually ends around January 23 and returns around December 24.

From the NOAA station Calliham, TX — 3 miles away, elevation 217 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 78007

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Dec 29 – Jan 12

SpinachSow outdoors · Dec 29 – Jan 19

Broccoli, cabbageStart indoors · Dec 1 – Dec 15

Broccoli, cabbageTransplant · Jan 19 – Feb 2

Onion setsPlant outdoors · Jan 12 – Jan 26

PotatoesPlant outdoors · Jan 19 – Feb 2

LettuceSow outdoors · Jan 12 – Jan 26

Carrots, beetsSow outdoors · Jan 19 – Feb 2

TomatoesStart indoors · Dec 15 – Dec 29

TomatoesTransplant · Feb 16 – Mar 2

Peppers, eggplantStart indoors · Dec 1 – Dec 15

Peppers, eggplantTransplant · Feb 23 – Mar 9

BeansSow outdoors · Feb 16 – Mar 2

Sweet cornSow outdoors · Feb 16 – Mar 2

Cucumbers, squashSow outdoors · Feb 16 – Mar 2

Fall lettuce, spinachSow outdoors · Oct 13 – Oct 27

GarlicPlant cloves · Nov 24 – Dec 29

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Feb 9) and first fall frost (Dec 8) 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 78007 came on Jan 15 — 7 days earlier than the 1991–2020 average (Jan 22).

average
Jan 222026
Jan 15

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 Calliham, TX.

Soil in Calliham, TX

The soil mapped at the center of ZIP 78007 is Monwebb — clay, moderately well drained.

TextureClayholds water and nutrients; slow to drain and warm up

pH7.9alkaline; most vegetables like 6.0–7.0

DrainageModerately well drainednatural drainage class

Organic matter2.5%moderate

Hydrologic groupDwater soaks in very slowly

Farmland classNot prime farmlandUSDA classification

Map unit: Monwebb clay, 0 to 1 percent slopes, occasionally flooded.

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 78007; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Calliham, TX

Summer high99 °Faverage high, August

Winter low43 °Faverage low, January

Hot days148days a year at 90 °F or more

Freezing nights8nights a year at 32 °F or less

Growing degree days8,102base 50 °F — the season’s usable heat

Longest day13 h 57 mindaylight on June 21

Shortest day10 h 20 mindaylight on December 21

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

Precipitation25.6 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: Calliham, TX (3 mi away); precipitation: Calliham, TX (3 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

780759a

Whitsett, TX · 11 mi

780719a

Three Rivers, TX · 13 mi

Campbellton, TX · 20 mi

780269a

Jourdanton, TX · 21 mi

780229b

George West, TX · 22 mi

780629a

Peggy, TX · 23 mi

Texas planting zones →

Questions about 78007

What planting zone is ZIP code 78007?

ZIP code 78007 (Calliham, 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 Calliham, TX?

The median last spring frost (32 °F) near 78007 is February 9; after March 7 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Calliham station.

When is the first frost in Calliham, TX?

The median first fall frost near 78007 is December 8, giving a median frost-free growing season of 303 days.

When should I plant tomatoes in 78007?

Start tomato seeds indoors around Dec 15 – Dec 29 and set transplants outside around Feb 16 – Mar 2, one to three weeks after the median last frost.

How much rain and snow does 78007 get?

About 25.6 inches of precipitation a year (NOAA 1991–2020 normals, Calliham station).

How hot do summers get in Calliham, TX?

The average high peaks at 99 °F in August, with about 148 days a year at 90 °F or more.

What kind of soil does 78007 have?

The USDA soil survey maps Monwebb at the center of ZIP 78007: clay, moderately well drained, pH about 7.9 (alkaline).

Did spring come early in Calliham, TX in 2026?

Spring leaf-out near 78007 came on Jan 15 in 2026, 7 days earlier than the 1991–2020 average (Jan 22), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Calliham, TX?

Short-day onions: the longest day near 78007 is 13 h 57 min, so summer days stay under about 14 h 20 min, so long-day varieties won’t bulb.

Did the zone for 78007 change?

Yes. The 2012 USDA map put 78007 in zone 9a; the 2023 map puts it in zone 9b. The newer map uses 1991–2020 data and more weather stations.