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

Planting zone for 72832 — Coal Hill, AR

ZIP code 72832 (Coal Hill, Johnson County) is in USDA zone 8a: the coldest winter night averages 10 to 15 °F. The median last spring frost is March 28 and the first fall frost November 5.

Where ZIP 72832 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.

Zone8a10 to 15 °F
Coldest night−12.2 to −9.4 °C
Last frostMar 28
First frostNov 5
2012 zone7b

Was 7b 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 8a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Coal Hill, AR…

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 Coal Hill, AR

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMarch 28median — 50% chance of a later frost
Safe for tender plantsApril 14only 10% chance of frost after
First fall frostNovember 5median — 10% chance by Oct 23
Growing season223 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 14 and returns around November 15.

From the NOAA station Subiaco, AR — 9 miles away, elevation 499 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 72832

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Feb 14 – Feb 28
SpinachSow outdoors · Feb 14 – Mar 7
Broccoli, cabbageStart indoors · Jan 17 – Jan 31
Broccoli, cabbageTransplant · Mar 7 – Mar 21
Onion setsPlant outdoors · Feb 28 – Mar 14
PotatoesPlant outdoors · Mar 7 – Mar 21
LettuceSow outdoors · Feb 28 – Mar 14
Carrots, beetsSow outdoors · Mar 7 – Mar 21
TomatoesStart indoors · Jan 31 – Feb 14
TomatoesTransplant · Apr 4 – Apr 18
Peppers, eggplantStart indoors · Jan 17 – Jan 31
Peppers, eggplantTransplant · Apr 11 – Apr 25
BeansSow outdoors · Apr 4 – Apr 18
Sweet cornSow outdoors · Apr 4 – Apr 18
Cucumbers, squashSow outdoors · Apr 4 – Apr 18
Fall lettuce, spinachSow outdoors · Sep 10 – Sep 24
GarlicPlant cloves · Oct 22 – Nov 26
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Mar 28) and first fall frost (Nov 5) 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 72832 came on Feb 13 — 8 days earlier than the 1991–2020 average (Feb 21).

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 Coal Hill, AR

The soil mapped at the center of ZIP 72832 is Cane — fine sandy loam, moderately well drained.

TextureFine sandy loamdrains and warms fast; dries out and needs more feeding
pH5.3strongly acidic; most vegetables like 6.0–7.0
DrainageModerately well drainednatural drainage class
Organic matter1.25%low — add compost
Hydrologic groupCwater soaks in slowly
Farmland classprime farmlandUSDA classification

Map unit: Cane fine sandy loam, 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 72832; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Coal Hill, AR

Summer high92 °Faverage high, July
Winter low29 °Faverage low, January
Hot days62days a year at 90 °F or more
Freezing nights67nights a year at 32 °F or less
Growing degree days5,090base 50 °F — the season’s usable heat
Longest day14 h 33 mindaylight on June 21
Shortest day9 h 46 mindaylight on December 21
Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully
Precipitation51.3 inper year, rain and melted snow
Snowfall1 inper year

Average high and low, by month

20°30°40°50°60°70°80°90°100°32 °FJanuary: average high 49 °F, low 29 °F 49°29° JanFebruary: average high 54 °F, low 32 °F 54°32° FebMarch: average high 63 °F, low 40 °F 63°40° MarApril: average high 72 °F, low 48 °F 72°48° AprMay: average high 80 °F, low 59 °F 80°59° MayJune: average high 88 °F, low 67 °F 88°67° JunJuly: average high 92 °F, low 71 °F 92°71° JulAugust: average high 92 °F, low 69 °F 92°69° AugSeptember: average high 85 °F, low 62 °F 85°62° SepOctober: average high 74 °F, low 50 °F 74°50° OctNovember: average high 61 °F, low 39 °F 61°39° NovDecember: average high 51 °F, low 32 °F 51°32° Dec

Precipitation by month inches · ❄ = snowfall

0″1″2″3″4″5″6″January: 3.92 in precipitation, 0.5 in snowfall 3.9❄1 JanFebruary: 3.30 in precipitation, 0.3 in snowfall 3.3 FebMarch: 4.57 in precipitation, 0.2 in snowfall 4.6 MarApril: 4.95 in precipitation 5.0 AprMay: 5.45 in precipitation 5.5 MayJune: 3.85 in precipitation 3.9 JunJuly: 3.71 in precipitation 3.7 JulAugust: 4.44 in precipitation 4.4 AugSeptember: 3.62 in precipitation 3.6 SepOctober: 4.69 in precipitation 4.7 OctNovember: 4.86 in precipitation 4.9 NovDecember: 3.90 in precipitation 3.9 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Subiaco, AR (9 mi away); precipitation: Coal Hill, AR (within 1 mile). Daylight is calculated from latitude.

Nearby ZIP codes

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

728218a
Altus, AR · 3 mi
728408a
Hartman, AR · 4 mi
728638a
Scranton, AR · 10 mi
728658a
Subiaco, AR · 11 mi
728308a
Clarksville, AR · 11 mi
729497b
Ozark, AR · 12 mi
728558a
Paris, AR · 13 mi
729518a
Ratcliff, AR · 15 mi

Arkansas planting zones →

Questions about 72832

What planting zone is ZIP code 72832?

ZIP code 72832 (Coal Hill, AR) is in USDA hardiness zone 8a on the 2023 map: the coldest night of an average winter reaches 10 to 15 °F (−12.2 to −9.4 °C).

When is the last frost in Coal Hill, AR?

The median last spring frost (32 °F) near 72832 is March 28; after April 14 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Subiaco station.

When is the first frost in Coal Hill, AR?

The median first fall frost near 72832 is November 5, giving a median frost-free growing season of 223 days.

When should I plant tomatoes in 72832?

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

How much rain and snow does 72832 get?

About 51.3 inches of precipitation a year and 1 inches of snowfall (NOAA 1991–2020 normals, Coal Hill station).

How hot do summers get in Coal Hill, AR?

The average high peaks at 92 °F in July, with about 62 days a year at 90 °F or more.

What kind of soil does 72832 have?

The USDA soil survey maps Cane at the center of ZIP 72832: fine sandy loam, moderately well drained, pH about 5.3 (strongly acidic).

Did spring come early in Coal Hill, AR in 2026?

Spring leaf-out near 72832 came on Feb 13 in 2026, 8 days earlier than the 1991–2020 average (Feb 21), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Coal Hill, AR?

Intermediate onions: the longest day near 72832 is 14 h 33 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Did the zone for 72832 change?

Yes. The 2012 USDA map put 72832 in zone 7b; the 2023 map puts it in zone 8a. The newer map uses 1991–2020 data and more weather stations.