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

Planting zone for Mccomb, MS

Mccomb, MS is in USDA zone 8b across its 2 ZIP codes. The median last spring frost is March 11 and the first fall frost November 18.

Mccomb on the zone map

Outlined: its 1 ZIP code areas · 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
ZIP codes2
Last frostMar 11
First frostNov 18
Growing season253 days

8b 2 ZIPs

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Mccomb, MS…

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 Mccomb, MS

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMarch 11median — 50% chance of a later frost
Safe for tender plantsApril 2only 10% chance of frost after
First fall frostNovember 18median — 10% chance by Nov 1
Growing season253 daysfrost-free, median

A hard freeze (28 °F) usually ends around February 25 and returns around December 1.

From the NOAA station Mccomb/Pike Co./John E Lewis Airport, MS, elevation 413 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 Mccomb

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Jan 28 – Feb 11
SpinachSow outdoors · Jan 28 – Feb 18
Broccoli, cabbageStart indoors · Dec 31 – Jan 14
Broccoli, cabbageTransplant · Feb 18 – Mar 4
Onion setsPlant outdoors · Feb 11 – Feb 25
PotatoesPlant outdoors · Feb 18 – Mar 4
LettuceSow outdoors · Feb 11 – Feb 25
Carrots, beetsSow outdoors · Feb 18 – Mar 4
TomatoesStart indoors · Jan 14 – Jan 28
TomatoesTransplant · Mar 18 – Apr 1
Peppers, eggplantStart indoors · Dec 31 – Jan 14
Peppers, eggplantTransplant · Mar 25 – Apr 8
BeansSow outdoors · Mar 18 – Apr 1
Sweet cornSow outdoors · Mar 18 – Apr 1
Cucumbers, squashSow outdoors · Mar 18 – Apr 1
Fall lettuce, spinachSow outdoors · Sep 23 – Oct 7
GarlicPlant cloves · Nov 4 – Dec 9
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Mar 11) and first fall frost (Nov 18) 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 39649 came on Jan 21 — 9 days earlier than the 1991–2020 average (Jan 30).

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).

Native plants for zone 8b in Mississippi

526 plants native to the lower 48 states, recorded in Mississippi, and rated by the USDA to survive 15 °F or colder — the bottom of zone 8b. Each links to its USDA PLANTS profile.

Trees 79

American basswood100 ft · blooms late spring · low shade tolerance · to −46 °FAmerican beech80 ft · blooms mid spring · low shade tolerance · to −44 °FAmerican chestnut115 ft · blooms early summer · high shade tolerance · to −33 °FAmerican elm120 ft · blooms early spring · medium shade tolerance · to −46 °FAmerican sycamore100 ft · blooms spring · medium shade tolerance · to −34 °FAtlantic white cedar50 ft · blooms spring · medium shade tolerance · to −36 °F

Shrubs 115

aloe yucca15 ft · blooms early summer · medium shade tolerance · to −1 °Falternateleaf dogwood25 ft · blooms mid spring · low shade tolerance · to −47 °FAmerican beautyberry6 ft · blooms early summer · medium shade tolerance · to −8 °FAmerican hazelnut10 ft · blooms spring · medium shade tolerance · to −33 °FAmerican holly40 ft · blooms mid spring · low shade tolerance · to −20 °FAmerican hornbeam30 ft · blooms mid spring · low shade tolerance · to −34 °F

Wildflowers & perennials 165

American bur-reed3 ft · blooms indeterminate · medium shade tolerance · to −33 °FAmerican eelgrass1 ft · blooms mid summer · high shade tolerance · to −33 °FAmerican lotus3 ft · blooms mid summer · high shade tolerance · to −36 °FAmerican pokeweed7 ft · blooms mid summer · low shade tolerance · to −33 °FAmerican spongeplant0.5 ft · blooms mid spring · high shade tolerance · to −24 °FAmerican water horehound1.8 ft · blooms early summer · low shade tolerance · to −38 °F

Grasses 147

American cupscale3 ft · blooms early summer · high shade tolerance · to −18 °Fautumn bluegrass1.5 ft · blooms late spring · medium shade tolerance · to −8 °Fawlfruit sedge4 ft · blooms mid spring · low shade tolerance · to −38 °Fbig bluestem6 ft · blooms summer · high shade tolerance · to −46 °Fbig cordgrass8 ft · blooms spring · high shade tolerance · to −3 °Fbighead rush3 ft · blooms early summer · low shade tolerance · to 12 °F

Vines 13

American bittersweet15 ft · blooms spring · low shade tolerance · to −38 °FAmerican wisteria50 ft · blooms spring · low shade tolerance · to −3 °Fcatbird grape30 ft · blooms late spring · medium shade tolerance · to −13 °Fcupseed30 ft · blooms late spring · low shade tolerance · to −3 °Fdevil's darning needles15 ft · blooms mid summer · medium shade tolerance · to −38 °Ffrost grape83 ft · blooms late spring · medium shade tolerance · to −23 °F

Source: USDA, NRCS. 2026. The PLANTS Database (plants.usda.gov), National Plant Data Team — state distribution, native status and the “Temperature, Minimum” characteristic. Check light, moisture and soil needs before buying; local nurseries and your state native plant society can confirm what thrives in Mccomb, MS.

Soil in Mccomb, MS

The soil mapped at the center of ZIP 39649 is Brookhaven — silt loam, moderately well drained.

TextureSilt loama good balance for most vegetables
pH5.3strongly acidic; most vegetables like 6.0–7.0
DrainageModerately well drainednatural drainage class
Organic matter1.25%low — add compost
Hydrologic groupC/Dslow when drained; wet otherwise
Farmland classprime farmlandUSDA classification

Map unit: Brookhaven silt loam, 2 to 5 percent slopes, eroded (bude).

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 39649; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Mccomb, MS

Summer high91 °Faverage high, July
Winter low38 °Faverage low, January
Hot days84days a year at 90 °F or more
Freezing nights30nights a year at 32 °F or less
Growing degree days6,290base 50 °F — the season’s usable heat
Longest day14 h 11 mindaylight on June 21
Shortest day10 h 07 mindaylight on December 21
Onions to growShort-daysummer days stay under about 14 h 20 min, so long-day varieties won’t bulb
Precipitation60.6 inper year, rain and melted snow

Average high and low, by month

30°40°50°60°70°80°90°100°32 °FJanuary: average high 60 °F, low 38 °F 60°38° JanFebruary: average high 64 °F, low 42 °F 64°42° FebMarch: average high 71 °F, low 48 °F 71°48° MarApril: average high 77 °F, low 54 °F 77°54° AprMay: average high 84 °F, low 62 °F 84°62° MayJune: average high 89 °F, low 69 °F 89°69° JunJuly: average high 91 °F, low 71 °F 91°71° JulAugust: average high 91 °F, low 71 °F 91°71° AugSeptember: average high 87 °F, low 67 °F 87°67° SepOctober: average high 79 °F, low 56 °F 79°56° OctNovember: average high 69 °F, low 45 °F 69°45° NovDecember: average high 62 °F, low 41 °F 62°41° Dec

Precipitation by month inches

0″2″4″6″January: 6.40 in precipitation 6.4 JanFebruary: 5.13 in precipitation 5.1 FebMarch: 5.51 in precipitation, 0.1 in snowfall 5.5 MarApril: 5.02 in precipitation 5.0 AprMay: 4.55 in precipitation 4.5 MayJune: 5.18 in precipitation 5.2 JunJuly: 5.95 in precipitation 6.0 JulAugust: 5.83 in precipitation 5.8 AugSeptember: 4.30 in precipitation 4.3 SepOctober: 3.79 in precipitation 3.8 OctNovember: 3.91 in precipitation 3.9 NovDecember: 5.03 in precipitation, 0.1 in snowfall 5.0 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Mccomb/Pike Co./John E Lewis Airport, MS (4 mi away); precipitation: Mccomb/Pike Co./John E Lewis Airport, MS (4 mi away). Daylight is calculated from latitude.

ZIP codes in Mccomb

396488b
15 to 20 °F
396498b
15 to 20 °F

Mississippi planting zones →

Questions about Mccomb

What planting zone is Mccomb, MS?

Mccomb, MS is in USDA hardiness zone 8b on the 2023 map (8b: 15 to 20 °F).

When is the last frost in Mccomb, MS?

The median last spring frost is March 11 and the median first fall frost is November 18 (NOAA 1991–2020 normals, Mccomb/Pike Co./John E Lewis Airport station).

When can I plant a garden in Mccomb, MS?

Cool-season crops like peas and spinach go in around Jan 28 – Feb 18; tomatoes, peppers, beans and squash after about Mar 18, once frost risk has passed.

What kind of onions grow in Mccomb, MS?

Short-day onions: the longest day is 14 h 11 min, so summer days stay under about 14 h 20 min, so long-day varieties won’t bulb.

How much rain and snow does Mccomb, MS get?

About 60.6 inches of precipitation a year (NOAA 1991–2020 normals).