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

Planting zone for 29839 — Montmorenci, SC

ZIP code 29839 (Montmorenci, Aiken County) is in USDA zone 8b: the coldest winter night averages 15 to 20 °F. The median last spring frost is March 21 and the first fall frost November 7.

Where ZIP 29839 is

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 21
First frostNov 7
2012 zone8a

Was 8a 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 8b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Montmorenci, 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 Montmorenci, SC

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMarch 21median — 50% chance of a later frost
Safe for tender plantsApril 6only 10% chance of frost after
First fall frostNovember 7median — 10% chance by Oct 25
Growing season232 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 9 and returns around November 19.

From the NOAA station Aiken 5se, SC — 6 miles away, elevation 492 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 29839

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Feb 7 – Feb 21
SpinachSow outdoors · Feb 7 – Feb 28
Broccoli, cabbageStart indoors · Jan 10 – Jan 24
Broccoli, cabbageTransplant · Feb 28 – Mar 14
Onion setsPlant outdoors · Feb 21 – Mar 7
PotatoesPlant outdoors · Feb 28 – Mar 14
LettuceSow outdoors · Feb 21 – Mar 7
Carrots, beetsSow outdoors · Feb 28 – Mar 14
TomatoesStart indoors · Jan 24 – Feb 7
TomatoesTransplant · Mar 28 – Apr 11
Peppers, eggplantStart indoors · Jan 10 – Jan 24
Peppers, eggplantTransplant · Apr 4 – Apr 18
BeansSow outdoors · Mar 28 – Apr 11
Sweet cornSow outdoors · Mar 28 – Apr 11
Cucumbers, squashSow outdoors · Mar 28 – Apr 11
Fall lettuce, spinachSow outdoors · Sep 12 – Sep 26
GarlicPlant cloves · Oct 24 – Nov 28
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Mar 21) and first fall frost (Nov 7) 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 29839 came on Feb 14 — 9 days later than the 1991–2020 average (Feb 5).

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 Montmorenci, SC

The soil mapped at the center of ZIP 29839 is Troup — sand, somewhat excessively drained.

TextureSanddrains and warms fast; dries out and needs more feeding
pH5.3strongly acidic; most vegetables like 6.0–7.0
DrainageSomewhat excessively drainednatural drainage class
Organic matter0.75%low — add compost
Hydrologic groupAwater soaks in fast
Farmland classNot prime farmlandUSDA classification

Map unit: Troup sand, 0 to 6 percent slopes, Carolina and Georgia Sand Hills.

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 29839; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Montmorenci, SC

Summer high93 °Faverage high, July
Winter low35 °Faverage low, January
Hot days86days a year at 90 °F or more
Freezing nights51nights a year at 32 °F or less
Growing degree days5,739base 50 °F — the season’s usable heat
Longest day14 h 23 mindaylight on June 21
Shortest day9 h 56 mindaylight on December 21
Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully
Precipitation49.2 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 56 °F, low 35 °F 56°35° JanFebruary: average high 60 °F, low 38 °F 60°38° FebMarch: average high 68 °F, low 44 °F 68°44° MarApril: average high 76 °F, low 52 °F 76°52° AprMay: average high 84 °F, low 61 °F 84°61° MayJune: average high 89 °F, low 69 °F 89°69° JunJuly: average high 93 °F, low 72 °F 93°72° JulAugust: average high 90 °F, low 71 °F 90°71° AugSeptember: average high 85 °F, low 65 °F 85°65° SepOctober: average high 77 °F, low 53 °F 77°53° OctNovember: average high 67 °F, low 41 °F 67°41° NovDecember: average high 59 °F, low 36 °F 59°36° Dec

Precipitation by month inches

0″1″2″3″4″5″6″January: 4.19 in precipitation 4.2 JanFebruary: 3.82 in precipitation 3.8 FebMarch: 4.27 in precipitation 4.3 MarApril: 3.48 in precipitation 3.5 AprMay: 3.34 in precipitation 3.3 MayJune: 5.73 in precipitation 5.7 JunJuly: 5.05 in precipitation 5.0 JulAugust: 4.91 in precipitation 4.9 AugSeptember: 4.30 in precipitation 4.3 SepOctober: 3.02 in precipitation 3.0 OctNovember: 3.01 in precipitation 3.0 NovDecember: 4.06 in precipitation 4.1 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Aiken 5se, SC (6 mi away); precipitation: Aiken 7.8 Sse, SC (6 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 8b.

298048b
Aiken, SC · 2 mi
298568b
Windsor, SC · 5 mi
298038b
Aiken, SC · 7 mi
298018b
Aiken, SC · 8 mi
298028b
Aiken, SC · 8 mi
298098b
New Ellenton, SC · 8 mi
298058b
Aiken, SC · 9 mi
298538b
Williston, SC · 12 mi

South Carolina planting zones →

Questions about 29839

What planting zone is ZIP code 29839?

ZIP code 29839 (Montmorenci, SC) 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 Montmorenci, SC?

The median last spring frost (32 °F) near 29839 is March 21; after April 6 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Aiken 5se station.

When is the first frost in Montmorenci, SC?

The median first fall frost near 29839 is November 7, giving a median frost-free growing season of 232 days.

When should I plant tomatoes in 29839?

Start tomato seeds indoors around Jan 24 – Feb 7 and set transplants outside around Mar 28 – Apr 11, one to three weeks after the median last frost.

How much rain and snow does 29839 get?

About 49.2 inches of precipitation a year (NOAA 1991–2020 normals, Aiken 7.8 Sse station).

How hot do summers get in Montmorenci, SC?

The average high peaks at 93 °F in July, with about 86 days a year at 90 °F or more.

What kind of soil does 29839 have?

The USDA soil survey maps Troup at the center of ZIP 29839: sand, somewhat excessively drained, pH about 5.3 (strongly acidic).

Did spring come early in Montmorenci, SC in 2026?

Spring leaf-out near 29839 came on Feb 14 in 2026, 9 days later than the 1991–2020 average (Feb 5), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Montmorenci, SC?

Intermediate onions: the longest day near 29839 is 14 h 23 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Did the zone for 29839 change?

Yes. The 2012 USDA map put 29839 in zone 8a; the 2023 map puts it in zone 8b. The newer map uses 1991–2020 data and more weather stations.