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

Planting zone for 79837 — Dell City, TX

ZIP code 79837 (Dell City, Hudspeth County) is in USDA zone 7b: the coldest winter night averages 5 to 10 °F. The median last spring frost is April 17 and the first fall frost October 25.

Where ZIP 79837 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.

Zone7b5 to 10 °F
Coldest night−15 to −12.2 °C
Last frostApr 17
First frostOct 25
2012 zone7b

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 7b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Dell City, 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 Dell City, TX

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 17median — 50% chance of a later frost
Safe for tender plantsMay 1only 10% chance of frost after
First fall frostOctober 25median — 10% chance by Oct 11
Growing season189 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 4 and returns around November 2.

From the NOAA station Dell City 5ssw, TX — 13 miles away, elevation 3,708 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 79837

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 6 – Mar 20
SpinachSow outdoors · Mar 6 – Mar 27
Broccoli, cabbageStart indoors · Feb 6 – Feb 20
Broccoli, cabbageTransplant · Mar 27 – Apr 10
Onion setsPlant outdoors · Mar 20 – Apr 3
PotatoesPlant outdoors · Mar 27 – Apr 10
LettuceSow outdoors · Mar 20 – Apr 3
Carrots, beetsSow outdoors · Mar 27 – Apr 10
TomatoesStart indoors · Feb 20 – Mar 6
TomatoesTransplant · Apr 24 – May 8
Peppers, eggplantStart indoors · Feb 6 – Feb 20
Peppers, eggplantTransplant · May 1 – May 15
BeansSow outdoors · Apr 24 – May 8
Sweet cornSow outdoors · Apr 24 – May 8
Cucumbers, squashSow outdoors · Apr 24 – May 8
Fall lettuce, spinachSow outdoors · Aug 30 – Sep 13
GarlicPlant cloves · Oct 11 – Nov 15
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 17) and first fall frost (Oct 25) 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 79837 came on Feb 11 — about the same time as the 1991–2020 average (Feb 9).

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 Dell City, TX

The soil mapped at the center of ZIP 79837 is Lozier — gravelly loam, well drained.

TextureGravelly loama good balance for most vegetables
pH8.2alkaline; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter0.4%low — add compost
Hydrologic groupDwater soaks in very slowly
Farmland classNot prime farmlandUSDA classification

Map unit: Lozier-Rock outcrop complex, 0 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 79837; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Dell City, TX

Summer high97 °Faverage high, June
Winter low23 °Faverage low, January
Hot days130days a year at 90 °F or more
Freezing nights102nights a year at 32 °F or less
Growing degree days4,783base 50 °F — the season’s usable heat
Longest day14 h 15 mindaylight on June 21
Shortest day10 h 03 mindaylight on December 21
Onions to growShort-daysummer days stay under about 14 h 20 min, so long-day varieties won’t bulb
Precipitation11.1 inper year, rain and melted snow

Average high and low, by month

10°20°30°40°50°60°70°80°90°100°110°32 °FJanuary: average high 59 °F, low 23 °F 59°23° JanFebruary: average high 64 °F, low 28 °F 64°28° FebMarch: average high 72 °F, low 33 °F 72°33° MarApril: average high 81 °F, low 40 °F 81°40° AprMay: average high 89 °F, low 49 °F 89°49° MayJune: average high 97 °F, low 59 °F 97°59° JunJuly: average high 96 °F, low 63 °F 96°63° JulAugust: average high 94 °F, low 62 °F 94°62° AugSeptember: average high 88 °F, low 55 °F 88°55° SepOctober: average high 80 °F, low 42 °F 80°42° OctNovember: average high 68 °F, low 29 °F 68°29° NovDecember: average high 59 °F, low 24 °F 59°24° Dec

Precipitation by month inches

0″1″2″3″January: 0.33 in precipitation 0.3 JanFebruary: 0.40 in precipitation 0.4 FebMarch: 0.41 in precipitation 0.4 MarApril: 0.32 in precipitation 0.3 AprMay: 0.78 in precipitation 0.8 MayJune: 1.02 in precipitation 1.0 JunJuly: 1.90 in precipitation 1.9 JulAugust: 1.78 in precipitation 1.8 AugSeptember: 2.04 in precipitation 2.0 SepOctober: 0.99 in precipitation 1.0 OctNovember: 0.52 in precipitation 0.5 NovDecember: 0.61 in precipitation 0.6 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Dell City 5ssw, TX (13 mi away); precipitation: Dell City 1.4 Sw, TX (12 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

798478a
Salt Flat, TX · 24 mi
883447b
Pinon, NM · 29 mi
882507b
Hope, NM · 44 mi
883507b
Timberon, NM · 46 mi
882208a
Carlsbad, NM · 46 mi
882688a
Whites City, NM · 46 mi
883547a
Weed, NM · 49 mi
882218a
Carlsbad, NM · 54 mi

Texas planting zones →

Questions about 79837

What planting zone is ZIP code 79837?

ZIP code 79837 (Dell City, TX) is in USDA hardiness zone 7b on the 2023 map: the coldest night of an average winter reaches 5 to 10 °F (−15 to −12.2 °C).

When is the last frost in Dell City, TX?

The median last spring frost (32 °F) near 79837 is April 17; after May 1 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Dell City 5ssw station.

When is the first frost in Dell City, TX?

The median first fall frost near 79837 is October 25, giving a median frost-free growing season of 189 days.

When should I plant tomatoes in 79837?

Start tomato seeds indoors around Feb 20 – Mar 6 and set transplants outside around Apr 24 – May 8, one to three weeks after the median last frost.

How much rain and snow does 79837 get?

About 11.1 inches of precipitation a year (NOAA 1991–2020 normals, Dell City 1.4 Sw station).

How hot do summers get in Dell City, TX?

The average high peaks at 97 °F in June, with about 130 days a year at 90 °F or more.

What kind of soil does 79837 have?

The USDA soil survey maps Lozier at the center of ZIP 79837: gravelly loam, well drained, pH about 8.2 (alkaline).

Did spring come early in Dell City, TX in 2026?

Spring leaf-out near 79837 came on Feb 11 in 2026, about the same as the 1991–2020 average (Feb 9), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Dell City, TX?

Short-day onions: the longest day near 79837 is 14 h 15 min, so summer days stay under about 14 h 20 min, so long-day varieties won’t bulb.