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

Planting zone for 78375 — Premont, TX

ZIP code 78375 (Premont, Jim Wells County) is in USDA zone 9b: the coldest winter night averages 25 to 30 °F. The median last spring frost is February 25 and the first fall frost December 1.

Where ZIP 78375 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 25
First frostDec 1
2012 zone9b

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 9b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Premont, 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 Premont, TX

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostFebruary 25median — 50% chance of a later frost
Safe for tender plantsMarch 18only 10% chance of frost after
First fall frostDecember 1median — 10% chance by Nov 12
Growing season285 daysfrost-free, median

A hard freeze (28 °F) usually ends around January 31 and returns around December 20.

From the NOAA station Falfurrias, TX — 18 miles away, elevation 138 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 78375

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Jan 14 – Jan 28
SpinachSow outdoors · Jan 14 – Feb 4
Broccoli, cabbageStart indoors · Dec 17 – Dec 31
Broccoli, cabbageTransplant · Feb 4 – Feb 18
Onion setsPlant outdoors · Jan 28 – Feb 11
PotatoesPlant outdoors · Feb 4 – Feb 18
LettuceSow outdoors · Jan 28 – Feb 11
Carrots, beetsSow outdoors · Feb 4 – Feb 18
TomatoesStart indoors · Dec 31 – Jan 14
TomatoesTransplant · Mar 4 – Mar 18
Peppers, eggplantStart indoors · Dec 17 – Dec 31
Peppers, eggplantTransplant · Mar 11 – Mar 25
BeansSow outdoors · Mar 4 – Mar 18
Sweet cornSow outdoors · Mar 4 – Mar 18
Cucumbers, squashSow outdoors · Mar 4 – Mar 18
Fall lettuce, spinachSow outdoors · Oct 6 – Oct 20
GarlicPlant cloves · Nov 17 – Dec 22
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Feb 25) and first fall frost (Dec 1) 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 78375 came on Jan 10 — 9 days earlier than the 1991–2020 average (Jan 19).

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 Premont, TX

The soil mapped at the center of ZIP 78375 is Miguel — fine sandy loam, well drained.

TextureFine sandy loamdrains and warms fast; dries out and needs more feeding
pH6.7neutral; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter0.8%low — add compost
Hydrologic groupCwater soaks in slowly
Farmland classPrime farmland if irrigatedUSDA classification

Map unit: Miguel fine sandy loam, warm, 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 78375; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Premont, TX

Summer high98 °Faverage high, July
Winter low43 °Faverage low, January
Hot days160days a year at 90 °F or more
Freezing nights10nights a year at 32 °F or less
Growing degree days8,244base 50 °F — the season’s usable heat
Longest day13 h 52 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
Precipitation27.4 inper year, rain and melted snow

Average high and low, by month

30°40°50°60°70°80°90°100°110°32 °FJanuary: average high 69 °F, low 43 °F 69°43° JanFebruary: average high 73 °F, low 47 °F 73°47° FebMarch: average high 80 °F, low 53 °F 80°53° MarApril: average high 86 °F, low 60 °F 86°60° AprMay: average high 91 °F, low 67 °F 91°67° MayJune: average high 96 °F, low 72 °F 96°72° JunJuly: average high 98 °F, low 73 °F 98°73° JulAugust: average high 98 °F, low 73 °F 98°73° AugSeptember: average high 92 °F, low 69 °F 92°69° SepOctober: average high 87 °F, low 60 °F 87°60° OctNovember: average high 78 °F, low 51 °F 78°51° NovDecember: average high 71 °F, low 45 °F 71°45° Dec

Precipitation by month inches

0″1″2″3″4″5″January: 1.10 in precipitation 1.1 JanFebruary: 0.92 in precipitation 0.9 FebMarch: 1.31 in precipitation 1.3 MarApril: 1.74 in precipitation 1.7 AprMay: 4.42 in precipitation 4.4 MayJune: 2.81 in precipitation 2.8 JunJuly: 2.82 in precipitation 2.8 JulAugust: 2.24 in precipitation 2.2 AugSeptember: 4.36 in precipitation 4.4 SepOctober: 3.00 in precipitation 3.0 OctNovember: 1.42 in precipitation 1.4 NovDecember: 1.25 in precipitation 1.3 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Falfurrias, TX (18 mi away); precipitation: Falfurrias, TX (18 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 9b.

783499b
Concepcion, TX · 7 mi
783559b
Falfurrias, TX · 14 mi
783429b
Ben Bolt, TX · 19 mi
783769b
Realitos, TX · 19 mi
783639b
Kingsville, TX · 20 mi
783649b
Kingsville, TX · 21 mi
783419b
Benavides, TX · 22 mi
783329b
Alice, TX · 23 mi

Texas planting zones →

Questions about 78375

What planting zone is ZIP code 78375?

ZIP code 78375 (Premont, 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 Premont, TX?

The median last spring frost (32 °F) near 78375 is February 25; after March 18 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Falfurrias station.

When is the first frost in Premont, TX?

The median first fall frost near 78375 is December 1, giving a median frost-free growing season of 285 days.

When should I plant tomatoes in 78375?

Start tomato seeds indoors around Dec 31 – Jan 14 and set transplants outside around Mar 4 – Mar 18, one to three weeks after the median last frost.

How much rain and snow does 78375 get?

About 27.4 inches of precipitation a year (NOAA 1991–2020 normals, Falfurrias station).

How hot do summers get in Premont, TX?

The average high peaks at 98 °F in July, with about 160 days a year at 90 °F or more.

What kind of soil does 78375 have?

The USDA soil survey maps Miguel at the center of ZIP 78375: fine sandy loam, well drained, pH about 6.7 (neutral).

Did spring come early in Premont, TX in 2026?

Spring leaf-out near 78375 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 Premont, TX?

Short-day onions: the longest day near 78375 is 13 h 52 min, so summer days stay under about 14 h 20 min, so long-day varieties won’t bulb.