Last frost date in Summerville, SC

Average last frost
March 22

Expect the last frost in Summerville around March 22. Frost after April 7 happens in only one year out of ten. The first fall frost usually arrives about November 12, which leaves 238 frost-free days. An early freeze before October 29 happens one year in ten.

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

No frost in the next 7 nights

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

  1. ThuOct 2247°
  2. FriOct 2350°
  3. SatOct 2451°
  4. SunOct 2551°
  5. MonOct 2649°
  6. TueOct 2752°
  7. WedOct 2854°
JanFebMarAprMayJunJulAugSepOctNovDecLast frost Mar 22First frost Nov 12238 frost-free daysBlue: chance of 32°F frost. Green: average frost-free season.JFMAMJJASOND238 frost-free days
Frost risk through the year at Summerville 4W, 3.7 miles from Summerville.

Planting calendar for Summerville

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 29–Apr 12
PumpkinsApr 5–Apr 19
SunflowersMar 22–Apr 12
CucumbersApr 5–Apr 12
CornMar 29–Apr 12
Sweet potatoesApr 12–Apr 26
WatermelonApr 5–Apr 19
Green beansMar 29–Apr 19
ZucchiniMar 29–Apr 12
OkraApr 12–Apr 26
PeppersApr 5–Apr 19
BasilMar 29–Apr 12
Butternut squashMar 29–Apr 12
CantaloupeApr 5–Apr 19
EggplantApr 5–Apr 19
Cool-season crops
JanFebMarAprMayJunJulAugSepOctNovDec
PotatoesFeb 22–Mar 8
OnionsFeb 8–Mar 1
CarrotsMar 1–Apr 5
LettuceMar 8–Mar 29
BroccoliFeb 22–Mar 8
BeetsFeb 22–Apr 5
PeasFeb 8–Feb 22
CabbageFeb 22–Mar 8
RadishesFeb 15–Mar 29
Brussels sproutsMar 8–Mar 22
SpinachFeb 8–Mar 1
CilantroMar 8–Mar 29
KaleFeb 22–Mar 8
Collard greensFeb 22–Mar 8
TurnipsFeb 22–Mar 8
DillMar 22–Apr 5
CeleryMar 29–Apr 5
CauliflowerMar 8–Mar 22
LeeksMar 8–Mar 22
Swiss chardMar 8–Apr 5
ParsleyMar 8–Mar 29
Fall bulbs and garlic
JanFebMarAprMayJunJulAugSepOctNovDec
Tulip bulbsOct 29–Dec 3
GarlicOct 22–Nov 26
Daffodil bulbsOct 15–Nov 26
Perennials
JanFebMarAprMayJunJulAugSepOctNovDec
StrawberriesFeb 22–Mar 8
AsparagusFeb 22–Mar 8

Frost probabilities

ThresholdSpring, 90% chance laterSpring, 50%Spring, 10%Fall, 10% chance earlierFall, 50%Fall, 90%
Light frost, 32°FMar 1Mar 22Apr 7Oct 29Nov 12Dec 3
Hard freeze, 28°FFeb 10Mar 7Mar 28Nov 7Nov 29Dec 28

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 Summerville 4W (USC00388426) sits 3.7 miles from the center of Summerville at 65 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 Summerville, SC?

The average last frost date in Summerville is March 22, based on NOAA 1991–2020 climate normals. There is a 10% chance of frost after April 7.

When is the first frost in Summerville?

The first frost in fall usually comes around November 12. One year in ten it arrives before October 29.

How long is the growing season in Summerville?

About 238 days between the average last and first frost.

When should I plant tomatoes in Summerville?

Plant tomato seedlings outside from March 29 to April 12. Start seeds indoors six to eight weeks earlier.

Nearby in South Carolina

All 33 cities in South Carolina