Last frost date in Hanahan, SC

Average last frost
March 7

In Hanahan, the last spring frost comes around March 7 in an average year. Wait until March 27 if you want 90% odds of no more frost. The first fall frost usually arrives about November 27, which leaves 266 frost-free days. An early freeze before November 8 happens one year in ten.

Safe after (10% risk)
Mar 27
Average first frost
Nov 27
Frost-free season
266 days
Hard freeze (28°F) ends
Feb 20
Next 7 nights in Hanahan

No frost in the next 7 nights

National Weather Service forecast, updated Oct 22, 12:57 UTC

  1. ThuOct 2248°
  2. FriOct 2350°
  3. SatOct 2451°
  4. SunOct 2552°
  5. MonOct 2650°
  6. TueOct 2753°
  7. WedOct 2855°
JanFebMarAprMayJunJulAugSepOctNovDecLast frost Mar 7First frost Nov 27266 frost-free daysBlue: chance of 32°F frost. Green: average frost-free season.JFMAMJJASOND266 frost-free days
Frost risk through the year at Charleston International Airport, 3.1 miles from Hanahan.

Planting calendar for Hanahan

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

Start indoorsPlant outSow outdoorsFall plantingAverage last and first frost
Warm-season crops
JanFebMarAprMayJunJulAugSepOctNovDec
TomatoesMar 14–Mar 28
PumpkinsMar 21–Apr 4
SunflowersMar 7–Mar 28
CucumbersMar 21–Mar 28
CornMar 14–Mar 28
Sweet potatoesMar 28–Apr 11
WatermelonMar 21–Apr 4
Green beansMar 14–Apr 4
ZucchiniMar 14–Mar 28
OkraMar 28–Apr 11
PeppersMar 21–Apr 4
BasilMar 14–Mar 28
Butternut squashMar 14–Mar 28
CantaloupeMar 21–Apr 4
EggplantMar 21–Apr 4
Cool-season crops
JanFebMarAprMayJunJulAugSepOctNovDec
PotatoesFeb 7–Feb 21
OnionsJan 24–Feb 14
CarrotsFeb 14–Mar 21
LettuceFeb 21–Mar 14
BroccoliFeb 7–Feb 21
BeetsFeb 7–Mar 21
PeasJan 24–Feb 7
CabbageFeb 7–Feb 21
RadishesJan 31–Mar 14
Brussels sproutsFeb 21–Mar 7
SpinachJan 24–Feb 14
CilantroFeb 21–Mar 14
KaleFeb 7–Feb 21
Collard greensFeb 7–Feb 21
TurnipsFeb 7–Feb 21
DillMar 7–Mar 21
CeleryMar 14–Mar 21
CauliflowerFeb 21–Mar 7
LeeksFeb 21–Mar 7
Swiss chardFeb 21–Mar 21
ParsleyFeb 21–Mar 14
Fall bulbs and garlic
JanFebMarAprMayJunJulAugSepOctNovDec
Tulip bulbsNov 13–Dec 15
GarlicOct 15–Nov 30
Daffodil bulbsOct 15–Nov 30
Perennials
JanFebMarAprMayJunJulAugSepOctNovDec
StrawberriesFeb 7–Feb 21
AsparagusFeb 7–Feb 21

Frost probabilities

ThresholdSpring, 90% chance laterSpring, 50%Spring, 10%Fall, 10% chance earlierFall, 50%Fall, 90%
Light frost, 32°FFeb 12Mar 7Mar 27Nov 8Nov 27Dec 21
Hard freeze, 28°FJan 21Feb 20Mar 14Nov 21Dec 15Jan 13

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 Charleston International Airport (USW00013880) sits 3.1 miles from the center of Hanahan at 40 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 Hanahan, SC?

The average last frost date in Hanahan is March 7, based on NOAA 1991–2020 climate normals. There is a 10% chance of frost after March 27.

When is the first frost in Hanahan?

The first frost in fall usually comes around November 27. One year in ten it arrives before November 8.

How long is the growing season in Hanahan?

About 266 days between the average last and first frost.

When should I plant tomatoes in Hanahan?

Plant tomato seedlings outside from March 14 to March 28. Start seeds indoors six to eight weeks earlier.

Nearby in South Carolina

All 33 cities in South Carolina