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

Planting zone for 76530 — Granger, TX

ZIP code 76530 (Granger, Williamson County) is in USDA zone 9a: the coldest winter night averages 20 to 25 °F. The median last spring frost is March 5 and the first fall frost November 22.

Where ZIP 76530 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 frostMar 5
First frostNov 22
2012 zone8b

Was 8b 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 9a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Granger, 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 Granger, TX

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMarch 5median — 50% chance of a later frost
Safe for tender plantsMarch 31only 10% chance of frost after
First fall frostNovember 22median — 10% chance by Nov 4
Growing season261 daysfrost-free, median

A hard freeze (28 °F) usually ends around February 20 and returns around December 6.

From the NOAA station Granger Dam, TX — 6 miles away, elevation 554 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 76530

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Jan 22 – Feb 5
SpinachSow outdoors · Jan 22 – Feb 12
Broccoli, cabbageStart indoors · Dec 25 – Jan 8
Broccoli, cabbageTransplant · Feb 12 – Feb 26
Onion setsPlant outdoors · Feb 5 – Feb 19
PotatoesPlant outdoors · Feb 12 – Feb 26
LettuceSow outdoors · Feb 5 – Feb 19
Carrots, beetsSow outdoors · Feb 12 – Feb 26
TomatoesStart indoors · Jan 8 – Jan 22
TomatoesTransplant · Mar 12 – Mar 26
Peppers, eggplantStart indoors · Dec 25 – Jan 8
Peppers, eggplantTransplant · Mar 19 – Apr 2
BeansSow outdoors · Mar 12 – Mar 26
Sweet cornSow outdoors · Mar 12 – Mar 26
Cucumbers, squashSow outdoors · Mar 12 – Mar 26
Fall lettuce, spinachSow outdoors · Sep 27 – Oct 11
GarlicPlant cloves · Nov 8 – Dec 13
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Mar 5) and first fall frost (Nov 22) 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 76530 came on Jan 30 — about the same time as the 1991–2020 average (Jan 29).

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 Granger, TX

The soil mapped at the center of ZIP 76530 is Heiden — clay, well drained.

TextureClayholds water and nutrients; slow to drain and warm up
pH8.2alkaline; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter2.5%moderate
Hydrologic groupDwater soaks in very slowly
Farmland classNot prime farmlandUSDA classification

Map unit: Heiden clay, 2 to 5 percent slopes, moderately eroded.

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 76530; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Granger, TX

Summer high97 °Faverage high, August
Winter low37 °Faverage low, January
Hot days111days a year at 90 °F or more
Freezing nights25nights a year at 32 °F or less
Growing degree days6,784base 50 °F — the season’s usable heat
Longest day14 h 08 mindaylight on June 21
Shortest day10 h 09 mindaylight on December 21
Onions to growShort-daysummer days stay under about 14 h 20 min, so long-day varieties won’t bulb
Precipitation36.4 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 61 °F, low 37 °F 61°37° JanFebruary: average high 65 °F, low 41 °F 65°41° FebMarch: average high 72 °F, low 48 °F 72°48° MarApril: average high 79 °F, low 55 °F 79°55° AprMay: average high 86 °F, low 63 °F 86°63° MayJune: average high 92 °F, low 70 °F 92°70° JunJuly: average high 96 °F, low 72 °F 96°72° JulAugust: average high 97 °F, low 72 °F 97°72° AugSeptember: average high 91 °F, low 67 °F 91°67° SepOctober: average high 82 °F, low 56 °F 82°56° OctNovember: average high 71 °F, low 47 °F 71°47° NovDecember: average high 62 °F, low 39 °F 62°39° Dec

Precipitation by month inches

0″1″2″3″4″5″6″January: 2.59 in precipitation 2.6 JanFebruary: 1.90 in precipitation 1.9 FebMarch: 2.87 in precipitation 2.9 MarApril: 3.08 in precipitation 3.1 AprMay: 5.62 in precipitation 5.6 MayJune: 3.45 in precipitation 3.5 JunJuly: 1.90 in precipitation 1.9 JulAugust: 2.50 in precipitation 2.5 AugSeptember: 3.42 in precipitation 3.4 SepOctober: 3.42 in precipitation 3.4 OctNovember: 2.66 in precipitation 2.7 NovDecember: 3.00 in precipitation 3.0 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Granger Dam, TX (6 mi away); precipitation: Granger, TX (within 1 mile). Daylight is calculated from latitude.

Nearby ZIP codes

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

765119a
Bartlett, TX · 6 mi
765738b
Schwertner, TX · 9 mi
765749a
Taylor, TX · 9 mi
786738b
Walburg, TX · 10 mi
786749a
Weir, TX · 11 mi
765239a
Davilla, TX · 11 mi
786809a
Round Rock, TX · 11 mi
786829a
Round Rock, TX · 11 mi

Texas planting zones →

Questions about 76530

What planting zone is ZIP code 76530?

ZIP code 76530 (Granger, 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 Granger, TX?

The median last spring frost (32 °F) near 76530 is March 5; after March 31 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Granger Dam station.

When is the first frost in Granger, TX?

The median first fall frost near 76530 is November 22, giving a median frost-free growing season of 261 days.

When should I plant tomatoes in 76530?

Start tomato seeds indoors around Jan 8 – Jan 22 and set transplants outside around Mar 12 – Mar 26, one to three weeks after the median last frost.

How much rain and snow does 76530 get?

About 36.4 inches of precipitation a year (NOAA 1991–2020 normals, Granger station).

How hot do summers get in Granger, TX?

The average high peaks at 97 °F in August, with about 111 days a year at 90 °F or more.

What kind of soil does 76530 have?

The USDA soil survey maps Heiden at the center of ZIP 76530: clay, well drained, pH about 8.2 (alkaline).

Did spring come early in Granger, TX in 2026?

Spring leaf-out near 76530 came on Jan 30 in 2026, about the same as the 1991–2020 average (Jan 29), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Granger, TX?

Short-day onions: the longest day near 76530 is 14 h 08 min, so summer days stay under about 14 h 20 min, so long-day varieties won’t bulb.

Did the zone for 76530 change?

Yes. The 2012 USDA map put 76530 in zone 8b; the 2023 map puts it in zone 9a. The newer map uses 1991–2020 data and more weather stations.