Data: 2023 USDA zones (PRISM/OSU) · NOAA 1991–2020 normals · updated Oct 29, 2026

Planting zone for 31150 — Atlanta, GA

Q: What planting zone is ZIP code 31150?

ZIP code 31150 (Atlanta, GA) 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).

Q: When is the last frost in Atlanta, GA?

The median last spring frost (32 °F) near 31150 is March 24; after April 10 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Atlanta Fulton Co. Airport station.

Q: When is the first frost in Atlanta, GA?

The median first fall frost near 31150 is November 8, giving a median frost-free growing season of 231 days.

Q: When should I plant tomatoes in 31150?

Start tomato seeds indoors around Jan 27 – Feb 10 and set transplants outside around Mar 31 – Apr 14, one to three weeks after the median last frost.

Q: How much rain and snow does 31150 get?

About 54.1 inches of precipitation a year and 1 inches of snowfall (NOAA 1991–2020 normals, Atlanta 9nw station).

Q: How hot do summers get in Atlanta, GA?

The average high peaks at 90 °F in July, with about 54 days a year at 90 °F or more.

Q: What kind of soil does 31150 have?

The USDA soil survey maps Wateree at the center of ZIP 31150: sandy loam, well drained, pH about 5.3 (strongly acidic).

Q: Did spring come early in Atlanta, GA in 2026?

Spring leaf-out near 31150 came on Feb 14 in 2026, 3 days later than the 1991–2020 average (Feb 11), according to the USA National Phenology Network Spring Index.

Q: What kind of onions grow in Atlanta, GA?

Intermediate onions: the longest day near 31150 is 14 h 24 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Q: Did the zone for 31150 change?

Yes. The 2012 USDA map put 31150 in zone 7b; the 2023 map puts it in zone 8a. The newer map uses 1991–2020 data and more weather stations.

ZIP code 31150 (Atlanta, Fulton County) is in USDA zone 8a: the coldest winter night averages 10 to 15 °F. The median last spring frost is March 24 and the first fall frost November 8.

Where ZIP 31150 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.

Zone8a10 to 15 °F

Coldest night−12.2 to −9.4 °C

Last frostMar 24

First frostNov 8

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 Atlanta, GA…

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 Atlanta, GA

JanFebMarAprMayJunJulAugSepOctNovDec

Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free

Last spring frostMarch 24median — 50% chance of a later frost

Safe for tender plantsApril 10only 10% chance of frost after

First fall frostNovember 8median — 10% chance by Oct 27

Growing season231 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 9 and returns around November 20.

From the NOAA station Atlanta Fulton Co. Airport, GA — 5 miles away, elevation 840 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 31150

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Feb 10 – Feb 24

SpinachSow outdoors · Feb 10 – Mar 3

Broccoli, cabbageStart indoors · Jan 13 – Jan 27

Broccoli, cabbageTransplant · Mar 3 – Mar 17

Onion setsPlant outdoors · Feb 24 – Mar 10

PotatoesPlant outdoors · Mar 3 – Mar 17

LettuceSow outdoors · Feb 24 – Mar 10

Carrots, beetsSow outdoors · Mar 3 – Mar 17

TomatoesStart indoors · Jan 27 – Feb 10

TomatoesTransplant · Mar 31 – Apr 14

Peppers, eggplantStart indoors · Jan 13 – Jan 27

Peppers, eggplantTransplant · Apr 7 – Apr 21

BeansSow outdoors · Mar 31 – Apr 14

Sweet cornSow outdoors · Mar 31 – Apr 14

Cucumbers, squashSow outdoors · Mar 31 – Apr 14

Fall lettuce, spinachSow outdoors · Sep 13 – Sep 27

GarlicPlant cloves · Oct 25 – Nov 29

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Mar 24) and first fall frost (Nov 8) 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 31150 came on Feb 14 — 3 days later than the 1991–2020 average (Feb 11).

average
Feb 112026
Feb 14

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 Atlanta, GA

The soil mapped at the center of ZIP 31150 is Wateree — sandy loam, well drained.

TextureSandy loamdrains 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: Wateree-Rion complex, 10 to 25 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 31150; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Atlanta, GA

Summer high90 °Faverage high, July

Winter low34 °Faverage low, January

Hot days54days a year at 90 °F or more

Freezing nights52nights a year at 32 °F or less

Growing degree days5,219base 50 °F — the season’s usable heat

Longest day14 h 24 mindaylight on June 21

Shortest day9 h 54 mindaylight on December 21

Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully

Precipitation54.1 inper year, rain and melted snow

Snowfall1 inper year

Average high and low, by month

Precipitation by month inches · ❄ = snowfall

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Atlanta Fulton Co. Airport, GA (5 mi away); precipitation: Atlanta 9nw, GA (2 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.

All 89 ZIP codes in Atlanta → · Georgia planting zones →

Questions about 31150

What planting zone is ZIP code 31150?

ZIP code 31150 (Atlanta, GA) 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 Atlanta, GA?

The median last spring frost (32 °F) near 31150 is March 24; after April 10 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Atlanta Fulton Co. Airport station.

When is the first frost in Atlanta, GA?

The median first fall frost near 31150 is November 8, giving a median frost-free growing season of 231 days.

When should I plant tomatoes in 31150?

Start tomato seeds indoors around Jan 27 – Feb 10 and set transplants outside around Mar 31 – Apr 14, one to three weeks after the median last frost.

How much rain and snow does 31150 get?

About 54.1 inches of precipitation a year and 1 inches of snowfall (NOAA 1991–2020 normals, Atlanta 9nw station).

How hot do summers get in Atlanta, GA?

The average high peaks at 90 °F in July, with about 54 days a year at 90 °F or more.

What kind of soil does 31150 have?

The USDA soil survey maps Wateree at the center of ZIP 31150: sandy loam, well drained, pH about 5.3 (strongly acidic).

Did spring come early in Atlanta, GA in 2026?

Spring leaf-out near 31150 came on Feb 14 in 2026, 3 days later than the 1991–2020 average (Feb 11), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Atlanta, GA?

Intermediate onions: the longest day near 31150 is 14 h 24 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Did the zone for 31150 change?

Yes. The 2012 USDA map put 31150 in zone 7b; the 2023 map puts it in zone 8a. The newer map uses 1991–2020 data and more weather stations.