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

Planting zone for 78005 — Bigfoot, TX

ZIP code 78005 (Bigfoot, Frio County) is in USDA zone 9a: the coldest winter night averages 20 to 25 °F. The median last spring frost is February 26 and the first fall frost November 28.

Where ZIP 78005 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.

Zone9a20 to 25 °F

Coldest night−6.7 to −3.9 °C

Last frostFeb 26

First frostNov 28

2012 zone9a

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 9a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Bigfoot, 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 Bigfoot, TX

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostFebruary 26median — 50% chance of a later frost

Safe for tender plantsMarch 17only 10% chance of frost after

First fall frostNovember 28median — 10% chance by Nov 6

Growing season278 daysfrost-free, median

A hard freeze (28 °F) usually ends around February 6 and returns around December 10.

From the NOAA station Charlotte 5 Nnw, TX — 5 miles away, elevation 440 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 78005

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Jan 15 – Jan 29

SpinachSow outdoors · Jan 15 – Feb 5

Broccoli, cabbageStart indoors · Dec 18 – Jan 1

Broccoli, cabbageTransplant · Feb 5 – Feb 19

Onion setsPlant outdoors · Jan 29 – Feb 12

PotatoesPlant outdoors · Feb 5 – Feb 19

LettuceSow outdoors · Jan 29 – Feb 12

Carrots, beetsSow outdoors · Feb 5 – Feb 19

TomatoesStart indoors · Jan 1 – Jan 15

TomatoesTransplant · Mar 5 – Mar 19

Peppers, eggplantStart indoors · Dec 18 – Jan 1

Peppers, eggplantTransplant · Mar 12 – Mar 26

BeansSow outdoors · Mar 5 – Mar 19

Sweet cornSow outdoors · Mar 5 – Mar 19

Cucumbers, squashSow outdoors · Mar 5 – Mar 19

Fall lettuce, spinachSow outdoors · Oct 3 – Oct 17

GarlicPlant cloves · Nov 14 – Dec 19

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Feb 26) and first fall frost (Nov 28) 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 78005 came on Jan 15 — 8 days earlier than the 1991–2020 average (Jan 23).

average
Jan 232026
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).

Soil in Bigfoot, TX

The soil mapped at the center of ZIP 78005 is Elmendorf — clay loam, well drained.

TextureClay loamholds water and nutrients; slow to drain and warm up

pH7.3neutral; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter2%moderate

Hydrologic groupDwater soaks in very slowly

Farmland classNot prime farmlandUSDA classification

Map unit: Elmendorf-Denhawken complex, 1 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 78005; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Bigfoot, TX

Summer high100 °Faverage high, August

Winter low42 °Faverage low, January

Hot days144days a year at 90 °F or more

Freezing nights16nights a year at 32 °F or less

Growing degree days8,248base 50 °F — the season’s usable heat

Longest day14 h 00 mindaylight on June 21

Shortest day10 h 18 mindaylight on December 21

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

Precipitation26.8 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: Charlotte 5 Nnw, TX (5 mi away); precipitation: Charlotte 5 Nnw, TX (5 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 9a.

780119a

Charlotte, TX · 11 mi

Texas planting zones →

Questions about 78005

What planting zone is ZIP code 78005?

ZIP code 78005 (Bigfoot, TX) is in USDA hardiness zone 9a on the 2023 map: the coldest night of an average winter reaches 20 to 25 °F (−6.7 to −3.9 °C).

When is the last frost in Bigfoot, TX?

The median last spring frost (32 °F) near 78005 is February 26; after March 17 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Charlotte 5 Nnw station.

When is the first frost in Bigfoot, TX?

The median first fall frost near 78005 is November 28, giving a median frost-free growing season of 278 days.

When should I plant tomatoes in 78005?

Start tomato seeds indoors around Jan 1 – Jan 15 and set transplants outside around Mar 5 – Mar 19, one to three weeks after the median last frost.

How much rain and snow does 78005 get?

About 26.8 inches of precipitation a year (NOAA 1991–2020 normals, Charlotte 5 Nnw station).

How hot do summers get in Bigfoot, TX?

The average high peaks at 100 °F in August, with about 144 days a year at 90 °F or more.

What kind of soil does 78005 have?

The USDA soil survey maps Elmendorf at the center of ZIP 78005: clay loam, well drained, pH about 7.3 (neutral).

Did spring come early in Bigfoot, TX in 2026?

Spring leaf-out near 78005 came on Jan 15 in 2026, 8 days earlier than the 1991–2020 average (Jan 23), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Bigfoot, TX?

Short-day onions: the longest day near 78005 is 14 h 00 min, so summer days stay under about 14 h 20 min, so long-day varieties won’t bulb.