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

Planting zone for 29180 — Winnsboro, SC

ZIP code 29180 (Winnsboro, Fairfield County) is in USDA zone 8a: the coldest winter night averages 10 to 15 °F. The median last spring frost is March 31 and the first fall frost November 6.

Where ZIP 29180 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 31
First frostNov 6
2012 zone8a

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 8a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Winnsboro, SC…

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 Winnsboro, SC

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMarch 31median — 50% chance of a later frost
Safe for tender plantsApril 18only 10% chance of frost after
First fall frostNovember 6median — 10% chance by Oct 25
Growing season221 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 18 and returns around November 17.

From the NOAA station Winnsboro, SC — within 1 mile, elevation 532 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 29180

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Feb 17 – Mar 3
SpinachSow outdoors · Feb 17 – Mar 10
Broccoli, cabbageStart indoors · Jan 20 – Feb 3
Broccoli, cabbageTransplant · Mar 10 – Mar 24
Onion setsPlant outdoors · Mar 3 – Mar 17
PotatoesPlant outdoors · Mar 10 – Mar 24
LettuceSow outdoors · Mar 3 – Mar 17
Carrots, beetsSow outdoors · Mar 10 – Mar 24
TomatoesStart indoors · Feb 3 – Feb 17
TomatoesTransplant · Apr 7 – Apr 21
Peppers, eggplantStart indoors · Jan 20 – Feb 3
Peppers, eggplantTransplant · Apr 14 – Apr 28
BeansSow outdoors · Apr 7 – Apr 21
Sweet cornSow outdoors · Apr 7 – Apr 21
Cucumbers, squashSow outdoors · Apr 7 – Apr 21
Fall lettuce, spinachSow outdoors · Sep 11 – Sep 25
GarlicPlant cloves · Oct 23 – Nov 27
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Mar 31) and first fall frost (Nov 6) 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 29180 came on Feb 18 — 6 days later than the 1991–2020 average (Feb 12).

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 Winnsboro, SC

The soil mapped at the center of ZIP 29180 is Cecil — sandy clay loam, well drained.

TextureSandy clay loamholds water and nutrients; slow to drain and warm up
pH5.2strongly acidic; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter0.5%low — add compost
Hydrologic groupBwater soaks in moderately
Farmland classFarmland of statewide importanceUSDA classification

Map unit: Cecil sandy clay loam, 6 to 10 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 29180; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Winnsboro, SC

Summer high91 °Faverage high, July
Winter low31 °Faverage low, January
Hot days62days a year at 90 °F or more
Freezing nights60nights a year at 32 °F or less
Growing degree days5,004base 50 °F — the season’s usable heat
Longest day14 h 27 mindaylight on June 21
Shortest day9 h 51 mindaylight on December 21
Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully
Precipitation45.1 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 53 °F, low 31 °F 53°31° JanFebruary: average high 57 °F, low 33 °F 57°33° FebMarch: average high 65 °F, low 40 °F 65°40° MarApril: average high 74 °F, low 48 °F 74°48° AprMay: average high 81 °F, low 57 °F 81°57° MayJune: average high 88 °F, low 65 °F 88°65° JunJuly: average high 91 °F, low 69 °F 91°69° JulAugust: average high 89 °F, low 68 °F 89°68° AugSeptember: average high 83 °F, low 62 °F 83°62° SepOctober: average high 74 °F, low 50 °F 74°50° OctNovember: average high 63 °F, low 39 °F 63°39° NovDecember: average high 55 °F, low 34 °F 55°34° Dec

Precipitation by month inches

0″1″2″3″4″5″January: 3.99 in precipitation 4.0 JanFebruary: 3.59 in precipitation 3.6 FebMarch: 4.03 in precipitation 4.0 MarApril: 3.10 in precipitation 3.1 AprMay: 3.07 in precipitation 3.1 MayJune: 4.05 in precipitation 4.0 JunJuly: 4.10 in precipitation 4.1 JulAugust: 4.69 in precipitation 4.7 AugSeptember: 3.88 in precipitation 3.9 SepOctober: 3.29 in precipitation 3.3 OctNovember: 3.19 in precipitation 3.2 NovDecember: 4.14 in precipitation 4.1 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Winnsboro, SC (within 1 mile); precipitation: Winnsboro, SC (within 1 mile). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 8a.

291328a
Rion, SC · 4 mi
290148a
Blackstock, SC · 11 mi
291308a
Ridgeway, SC · 13 mi
290168a
Blythewood, SC · 13 mi
290658a
Jenkinsville, SC · 13 mi
290158a
Blair, SC · 15 mi
291228a
Peak, SC · 16 mi
290748a
Liberty Hill, SC · 17 mi

South Carolina planting zones →

Questions about 29180

What planting zone is ZIP code 29180?

ZIP code 29180 (Winnsboro, SC) 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 Winnsboro, SC?

The median last spring frost (32 °F) near 29180 is March 31; after April 18 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Winnsboro station.

When is the first frost in Winnsboro, SC?

The median first fall frost near 29180 is November 6, giving a median frost-free growing season of 221 days.

When should I plant tomatoes in 29180?

Start tomato seeds indoors around Feb 3 – Feb 17 and set transplants outside around Apr 7 – Apr 21, one to three weeks after the median last frost.

How much rain and snow does 29180 get?

About 45.1 inches of precipitation a year (NOAA 1991–2020 normals, Winnsboro station).

How hot do summers get in Winnsboro, SC?

The average high peaks at 91 °F in July, with about 62 days a year at 90 °F or more.

What kind of soil does 29180 have?

The USDA soil survey maps Cecil at the center of ZIP 29180: sandy clay loam, well drained, pH about 5.2 (strongly acidic).

Did spring come early in Winnsboro, SC in 2026?

Spring leaf-out near 29180 came on Feb 18 in 2026, 6 days later than the 1991–2020 average (Feb 12), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Winnsboro, SC?

Intermediate onions: the longest day near 29180 is 14 h 27 min, so day-neutral types bulb best; long-day varieties may not bulb fully.