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

Planting zone for 78382 — Rockport, TX

ZIP code 78382 (Rockport, Aransas County) is in USDA zone 9b: the coldest winter night averages 25 to 30 °F.

Where ZIP 78382 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 frostrare
First frostrare
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 Rockport, 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

A 32 °F frost doesn't happen here in most winters. At the nearest station (NOAA station Rockport Aransas Co. Airport, TX — 2 miles away, elevation 23 ft) the median growing season is 347 days. When frost does come, it is a midwinter night or two; cover tender plants when a freeze is forecast.

Frost data: NOAA NCEI U.S. Climate Normals 1991–2020.

When spring arrived in 2026

In 2026, spring leaf-out near 78382 came on Jan 11 — 9 days earlier than the 1991–2020 average (Jan 20).

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.

Trees 72

American basswood100 ft · blooms late spring · low shade tolerance · to −46 °FAmerican beech80 ft · blooms mid spring · low shade tolerance · to −44 °FAmerican elm120 ft · blooms early spring · medium shade tolerance · to −46 °FAmerican sycamore100 ft · blooms spring · medium shade tolerance · to −34 °FArizona cypress50 ft · blooms spring · low shade tolerance · to −23 °FArizona walnut50 ft · blooms late spring · high shade tolerance · to −33 °F

Shrubs 142

alderleaf mountain mahogany15 ft · blooms late spring · medium shade tolerance · to −41 °Faloe yucca15 ft · blooms early summer · medium shade tolerance · to −1 °FAmerican beautyberry6 ft · blooms early summer · medium shade tolerance · to −8 °FAmerican holly40 ft · blooms mid spring · low shade tolerance · to −20 °FAmerican hornbeam30 ft · blooms mid spring · low shade tolerance · to −34 °FAmerican snowbell10 ft · blooms spring · medium shade tolerance · to −16 °F

Wildflowers & perennials 212

alkali buttercup1 ft · blooms late spring · low shade tolerance · to −38 °Falpine mountainsorrel1 ft · blooms mid summer · medium shade tolerance · to −43 °FAmerican bur-reed3 ft · blooms indeterminate · medium shade tolerance · to −33 °FAmerican century plant6 ft · blooms indeterminate · high shade tolerance · to 12 °FAmerican eelgrass1 ft · blooms mid summer · high shade tolerance · to −33 °FAmerican licorice4 ft · blooms late spring · medium shade tolerance · to −38 °F

Grasses 197

alkali sacaton3 ft · blooms mid summer · high shade tolerance · to −38 °FAmerican cupscale3 ft · blooms early summer · high shade tolerance · to −18 °FArizona cottontop4 ft · blooms late summer · high shade tolerance · to −13 °FArizona fescue2 ft · blooms late spring · high shade tolerance · to −23 °FArizona threeawn2 ft · blooms mid summer · high shade tolerance · to −3 °Fautumn bluegrass1.5 ft · blooms late spring · medium shade tolerance · to −8 °F

Vines 14

American bittersweet15 ft · blooms spring · low shade tolerance · to −38 °FAmerican wisteria50 ft · blooms spring · low shade tolerance · to −3 °Fcatbird grape30 ft · blooms late spring · medium shade tolerance · to −13 °Fcupseed30 ft · blooms late spring · low shade tolerance · to −3 °Fdevil's darning needles15 ft · blooms mid summer · medium shade tolerance · to −38 °Ffrost grape83 ft · blooms late spring · medium shade tolerance · to −23 °F

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 Rockport, TX.

Soil in Rockport, TX

The soil mapped at the center of ZIP 78382 is Mustang — fine sand, poorly drained.

TextureFine sanddrains and warms fast; dries out and needs more feeding
pH7.4slightly alkaline; most vegetables like 6.0–7.0
DrainagePoorly drainedconsider raised beds
Organic matter0.55%low — add compost
Hydrologic groupC/Dslow when drained; wet otherwise
Farmland classNot prime farmlandUSDA classification

Map unit: Mustang fine sand, 0 to 1 percent slopes, occasionally flooded, frequently ponded.

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 78382; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Rockport, TX

Summer high92 °Faverage high, August
Winter low49 °Faverage low, January
Hot days105days a year at 90 °F or more
Freezing nights3nights a year at 32 °F or less
Growing degree days8,501base 50 °F — the season’s usable heat
Longest day13 h 56 mindaylight on June 21
Shortest day10 h 21 mindaylight on December 21
Onions to growShort-daysummer days stay under about 14 h 20 min, so long-day varieties won’t bulb
Precipitation28.4 inper year, rain and melted snow

Average high and low, by month

40°50°60°70°80°90°100°January: average high 65 °F, low 49 °F 65°49° JanFebruary: average high 69 °F, low 54 °F 69°54° FebMarch: average high 74 °F, low 60 °F 74°60° MarApril: average high 80 °F, low 66 °F 80°66° AprMay: average high 85 °F, low 73 °F 85°73° MayJune: average high 90 °F, low 78 °F 90°78° JunJuly: average high 91 °F, low 79 °F 91°79° JulAugust: average high 92 °F, low 79 °F 92°79° AugSeptember: average high 89 °F, low 75 °F 89°75° SepOctober: average high 84 °F, low 68 °F 84°68° OctNovember: average high 75 °F, low 58 °F 75°58° NovDecember: average high 68 °F, low 51 °F 68°51° Dec

Precipitation by month inches

0″1″2″3″4″5″January: 1.72 in precipitation 1.7 JanFebruary: 1.05 in precipitation 1.1 FebMarch: 1.95 in precipitation 1.9 MarApril: 1.46 in precipitation 1.5 AprMay: 3.20 in precipitation 3.2 MayJune: 3.90 in precipitation 3.9 JunJuly: 2.51 in precipitation 2.5 JulAugust: 1.50 in precipitation 1.5 AugSeptember: 4.18 in precipitation 4.2 SepOctober: 2.82 in precipitation 2.8 OctNovember: 2.43 in precipitation 2.4 NovDecember: 1.66 in precipitation 1.7 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Rockport Aransas Co. Airport, TX (2 mi away); precipitation: Rockport Aransas Co. Airport, TX (2 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

7835810a
Fulton, TX · 3 mi
783819b
Rockport, TX · 7 mi
783409b
Bayside, TX · 9 mi
779509b
Austwell, TX · 13 mi
7833610a
Aransas Pass, TX · 15 mi
783779b
Refugio, TX · 16 mi
7833510a
Aransas Pass, TX · 16 mi
783939b
Woodsboro, TX · 19 mi

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

Questions about 78382

What planting zone is ZIP code 78382?

ZIP code 78382 (Rockport, 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).

How much rain and snow does 78382 get?

About 28.4 inches of precipitation a year (NOAA 1991–2020 normals, Rockport Aransas Co. Airport station).

How hot do summers get in Rockport, TX?

The average high peaks at 92 °F in August, with about 105 days a year at 90 °F or more.

What kind of soil does 78382 have?

The USDA soil survey maps Mustang at the center of ZIP 78382: fine sand, poorly drained, pH about 7.4 (slightly alkaline).

Did spring come early in Rockport, TX in 2026?

Spring leaf-out near 78382 came on Jan 11 in 2026, 9 days earlier than the 1991–2020 average (Jan 20), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Rockport, TX?

Short-day onions: the longest day near 78382 is 13 h 56 min, so summer days stay under about 14 h 20 min, so long-day varieties won’t bulb.