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

Planting zone for 75937 — Chireno, TX

ZIP code 75937 (Chireno, Nacogdoches County) is in USDA zone 8b: the coldest winter night averages 15 to 20 °F. The median last spring frost is March 18 and the first fall frost November 13.

Where ZIP 75937 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.

Zone8b15 to 20 °F
Coldest night−9.4 to −6.7 °C
Last frostMar 18
First frostNov 13
2012 zone8b

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 8b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Chireno, 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 Chireno, TX

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMarch 18median — 50% chance of a later frost
Safe for tender plantsApril 8only 10% chance of frost after
First fall frostNovember 13median — 10% chance by Oct 29
Growing season240 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 4 and returns around November 25.

From the NOAA station San Augustine, TX — 17 miles away, elevation 295 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 75937

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Feb 4 – Feb 18
SpinachSow outdoors · Feb 4 – Feb 25
Broccoli, cabbageStart indoors · Jan 7 – Jan 21
Broccoli, cabbageTransplant · Feb 25 – Mar 11
Onion setsPlant outdoors · Feb 18 – Mar 4
PotatoesPlant outdoors · Feb 25 – Mar 11
LettuceSow outdoors · Feb 18 – Mar 4
Carrots, beetsSow outdoors · Feb 25 – Mar 11
TomatoesStart indoors · Jan 21 – Feb 4
TomatoesTransplant · Mar 25 – Apr 8
Peppers, eggplantStart indoors · Jan 7 – Jan 21
Peppers, eggplantTransplant · Apr 1 – Apr 15
BeansSow outdoors · Mar 25 – Apr 8
Sweet cornSow outdoors · Mar 25 – Apr 8
Cucumbers, squashSow outdoors · Mar 25 – Apr 8
Fall lettuce, spinachSow outdoors · Sep 18 – Oct 2
GarlicPlant cloves · Oct 30 – Dec 4
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Mar 18) and first fall frost (Nov 13) 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 75937 came on Feb 4 — 4 days later than the 1991–2020 average (Jan 31).

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 Chireno, TX

The soil mapped at the center of ZIP 75937 is Lilbert — loamy fine sand, well drained.

TextureLoamy fine sanddrains and warms fast; dries out and needs more feeding
pH5.3strongly acidic; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter1.25%low — add compost
Hydrologic groupBwater soaks in moderately
Farmland classNot prime farmlandUSDA classification

Map unit: Lilbert loamy fine sand, 1 to 8 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 75937; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Chireno, TX

Summer high94 °Faverage high, July
Winter low35 °Faverage low, January
Hot days96days a year at 90 °F or more
Freezing nights37nights a year at 32 °F or less
Growing degree days6,121base 50 °F — the season’s usable heat
Longest day14 h 12 mindaylight on June 21
Shortest day10 h 06 mindaylight on December 21
Onions to growShort-daysummer days stay under about 14 h 20 min, so long-day varieties won’t bulb
Precipitation58.6 inper year, rain and melted snow

Average high and low, by month

20°30°40°50°60°70°80°90°100°32 °FJanuary: average high 60 °F, low 35 °F 60°35° JanFebruary: average high 63 °F, low 39 °F 63°39° FebMarch: average high 70 °F, low 45 °F 70°45° MarApril: average high 77 °F, low 53 °F 77°53° AprMay: average high 84 °F, low 61 °F 84°61° MayJune: average high 90 °F, low 68 °F 90°68° JunJuly: average high 94 °F, low 70 °F 94°70° JulAugust: average high 94 °F, low 70 °F 94°70° AugSeptember: average high 89 °F, low 64 °F 89°64° SepOctober: average high 80 °F, low 53 °F 80°53° OctNovember: average high 70 °F, low 44 °F 70°44° NovDecember: average high 61 °F, low 37 °F 61°37° Dec

Precipitation by month inches

0″1″2″3″4″5″6″January: 5.07 in precipitation 5.1 JanFebruary: 4.95 in precipitation, 0.1 in snowfall 5.0 FebMarch: 5.25 in precipitation 5.3 MarApril: 4.73 in precipitation 4.7 AprMay: 5.53 in precipitation 5.5 MayJune: 5.13 in precipitation 5.1 JunJuly: 3.11 in precipitation 3.1 JulAugust: 4.23 in precipitation 4.2 AugSeptember: 4.37 in precipitation 4.4 SepOctober: 5.15 in precipitation 5.2 OctNovember: 5.22 in precipitation 5.2 NovDecember: 5.85 in precipitation 5.8 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: San Augustine, TX (17 mi away); precipitation: Chireno, TX (3 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.

759789a
Woden, TX · 8 mi
759618b
Nacogdoches, TX · 8 mi
759449a
Etoile, TX · 9 mi
759588b
Martinsville, TX · 11 mi
759728b
San Augustine, TX · 16 mi
759628b
Nacogdoches, TX · 18 mi
759638b
Nacogdoches, TX · 18 mi
759499a
Huntington, TX · 19 mi

Texas planting zones →

Questions about 75937

What planting zone is ZIP code 75937?

ZIP code 75937 (Chireno, TX) is in USDA hardiness zone 8b on the 2023 map: the coldest night of an average winter reaches 15 to 20 °F (−9.4 to −6.7 °C).

When is the last frost in Chireno, TX?

The median last spring frost (32 °F) near 75937 is March 18; after April 8 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, San Augustine station.

When is the first frost in Chireno, TX?

The median first fall frost near 75937 is November 13, giving a median frost-free growing season of 240 days.

When should I plant tomatoes in 75937?

Start tomato seeds indoors around Jan 21 – Feb 4 and set transplants outside around Mar 25 – Apr 8, one to three weeks after the median last frost.

How much rain and snow does 75937 get?

About 58.6 inches of precipitation a year (NOAA 1991–2020 normals, Chireno station).

How hot do summers get in Chireno, TX?

The average high peaks at 94 °F in July, with about 96 days a year at 90 °F or more.

What kind of soil does 75937 have?

The USDA soil survey maps Lilbert at the center of ZIP 75937: loamy fine sand, well drained, pH about 5.3 (strongly acidic).

Did spring come early in Chireno, TX in 2026?

Spring leaf-out near 75937 came on Feb 4 in 2026, 4 days later than the 1991–2020 average (Jan 31), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Chireno, TX?

Short-day onions: the longest day near 75937 is 14 h 12 min, so summer days stay under about 14 h 20 min, so long-day varieties won’t bulb.