Last frost date in Alpharetta, GA

Average last frost
March 25

Expect the last frost in Alpharetta around March 25. Frost after April 12 happens in only one year out of ten. The first fall frost usually arrives about November 9, which leaves 228 frost-free days. An early freeze before October 26 happens one year in ten.

Safe after (10% risk)
Apr 12
Average first frost
Nov 9
Frost-free season
228 days
Hard freeze (28°F) ends
Mar 12
Next 7 nights in Alpharetta

No frost in the next 7 nights

National Weather Service forecast, updated Oct 22, 12:24 UTC

  1. ThuOct 2249°
  2. FriOct 2347°
  3. SatOct 2445°
  4. SunOct 2545°
  5. MonOct 2645°
  6. TueOct 2748°
  7. WedOct 2847°
JanFebMarAprMayJunJulAugSepOctNovDecLast frost Mar 25First frost Nov 9228 frost-free daysBlue: chance of 32°F frost. Green: average frost-free season.JFMAMJJASOND228 frost-free days
Frost risk through the year at Atlanta Peachtree Airport, 13.6 miles from Alpharetta.

Planting calendar for Alpharetta

Windows count forward or back from the average frost dates above. Click a crop for dates across Georgia.

Start indoorsPlant outSow outdoorsFall plantingAverage last and first frost
Warm-season crops
JanFebMarAprMayJunJulAugSepOctNovDec
TomatoesApr 1–Apr 15
PumpkinsApr 8–Apr 22
SunflowersMar 25–Apr 15
CucumbersApr 8–Apr 15
CornApr 1–Apr 15
Sweet potatoesApr 15–Apr 29
WatermelonApr 8–Apr 22
Green beansApr 1–Apr 22
ZucchiniApr 1–Apr 15
OkraApr 15–Apr 29
PeppersApr 8–Apr 22
BasilApr 1–Apr 15
Butternut squashApr 1–Apr 15
CantaloupeApr 8–Apr 22
EggplantApr 8–Apr 22
Cool-season crops
JanFebMarAprMayJunJulAugSepOctNovDec
PotatoesFeb 25–Mar 11
OnionsFeb 11–Mar 4
CarrotsMar 4–Apr 8
LettuceMar 11–Apr 1
BroccoliFeb 25–Mar 11
BeetsFeb 25–Apr 8
PeasFeb 11–Feb 25
CabbageFeb 25–Mar 11
RadishesFeb 18–Apr 1
Brussels sproutsMar 11–Mar 25
SpinachFeb 11–Mar 4
CilantroMar 11–Apr 1
KaleFeb 25–Mar 11
Collard greensFeb 25–Mar 11
TurnipsFeb 25–Mar 11
DillMar 25–Apr 8
CeleryApr 1–Apr 8
CauliflowerMar 11–Mar 25
LeeksMar 11–Mar 25
Swiss chardMar 11–Apr 8
ParsleyMar 11–Apr 1
Fall bulbs and garlic
JanFebMarAprMayJunJulAugSepOctNovDec
Tulip bulbsOct 26–Nov 30
GarlicOct 19–Nov 23
Daffodil bulbsOct 12–Nov 23
Perennials
JanFebMarAprMayJunJulAugSepOctNovDec
StrawberriesFeb 25–Mar 11
AsparagusFeb 25–Mar 11

Frost probabilities

ThresholdSpring, 90% chance laterSpring, 50%Spring, 10%Fall, 10% chance earlierFall, 50%Fall, 90%
Light frost, 32°FMar 5Mar 25Apr 12Oct 26Nov 9Nov 27
Hard freeze, 28°FFeb 18Mar 12Mar 31Nov 4Nov 22Dec 14

Read the spring 10% column as the date after which only one year in ten still gets frost. That is the safer date for tomatoes, peppers and basil.

Where these numbers come from

NOAA station Atlanta Peachtree Airport (USW00053863) sits 13.6 miles from the center of Alpharetta at 1,002 feet. Its averages cover 1991 to 2020. Low spots, valleys and open fields can keep getting frost a week or two after the station stops; city centers and lakeshores usually get less of it.

Questions

When is the last frost in Alpharetta, GA?

The average last frost date in Alpharetta is March 25, based on NOAA 1991–2020 climate normals. There is a 10% chance of frost after April 12.

When is the first frost in Alpharetta?

The first frost in fall usually comes around November 9. One year in ten it arrives before October 26.

How long is the growing season in Alpharetta?

About 228 days between the average last and first frost.

When should I plant tomatoes in Alpharetta?

Plant tomato seedlings outside from April 1 to April 15. Start seeds indoors six to eight weeks earlier.

Nearby in Georgia

All 63 cities in Georgia