Last frost date in Smyrna, TN

Average last frost
April 13

The average last frost in Smyrna is April 13. By May 4 the chance of another 32°F night drops to 1 in 10. The first fall frost usually arrives about October 21, which leaves 189 frost-free days. An early freeze before October 8 happens one year in ten.

Safe after (10% risk)
May 4
Average first frost
Oct 21
Frost-free season
189 days
Hard freeze (28°F) ends
Apr 1
Next 7 nights in Smyrna

No frost in the next 7 nights

Later than usual: the average first frost here is October 21.

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

  1. ThuOct 2244°
  2. FriOct 2344°
  3. SatOct 2445°
  4. SunOct 2544°
  5. MonOct 2645°
  6. TueOct 2748°
  7. WedOct 2846°
JanFebMarAprMayJunJulAugSepOctNovDecLast frost Apr 13First frost Oct 21189 frost-free daysBlue: chance of 32°F frost. Green: average frost-free season.JFMAMJJASOND189 frost-free days
Frost risk through the year at Smyrna 6S, 4.4 miles from Smyrna.

Planting calendar for Smyrna

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

Start indoorsPlant outSow outdoorsFall plantingAverage last and first frost
Warm-season crops
JanFebMarAprMayJunJulAugSepOctNovDec
TomatoesApr 20–May 4
PumpkinsApr 27–May 11
SunflowersApr 13–May 4
CucumbersApr 27–May 4
CornApr 20–May 4
Sweet potatoesMay 4–May 18
WatermelonApr 27–May 11
Green beansApr 20–May 11
ZucchiniApr 20–May 4
OkraMay 4–May 18
PeppersApr 27–May 11
BasilApr 20–May 4
Butternut squashApr 20–May 4
CantaloupeApr 27–May 11
EggplantApr 27–May 11
Cool-season crops
JanFebMarAprMayJunJulAugSepOctNovDec
PotatoesMar 16–Mar 30
OnionsMar 2–Mar 23
CarrotsMar 23–Apr 27
LettuceMar 30–Apr 20
BroccoliMar 16–Mar 30
BeetsMar 16–Apr 27
PeasMar 2–Mar 16
CabbageMar 16–Mar 30
RadishesMar 9–Apr 20
Brussels sproutsMar 30–Apr 13
SpinachMar 2–Mar 23
CilantroMar 30–Apr 20
KaleMar 16–Mar 30
Collard greensMar 16–Mar 30
TurnipsMar 16–Mar 30
DillApr 13–Apr 27
CeleryApr 20–Apr 27
CauliflowerMar 30–Apr 13
LeeksMar 30–Apr 13
Swiss chardMar 30–Apr 27
ParsleyMar 30–Apr 20
Fall bulbs and garlic
JanFebMarAprMayJunJulAugSepOctNovDec
Tulip bulbsOct 7–Nov 11
GarlicSep 30–Nov 4
Daffodil bulbsSep 23–Nov 4
Perennials
JanFebMarAprMayJunJulAugSepOctNovDec
StrawberriesMar 16–Mar 30
AsparagusMar 16–Mar 30

Frost probabilities

ThresholdSpring, 90% chance laterSpring, 50%Spring, 10%Fall, 10% chance earlierFall, 50%Fall, 90%
Light frost, 32°FMar 31Apr 13May 4Oct 8Oct 21Nov 2
Hard freeze, 28°FMar 18Apr 1Apr 15Oct 16Oct 30Nov 11

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 Smyrna 6S (USC00408414) sits 4.4 miles from the center of Smyrna at 550 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 Smyrna, TN?

The average last frost date in Smyrna is April 13, based on NOAA 1991–2020 climate normals. There is a 10% chance of frost after May 4.

When is the first frost in Smyrna?

The first frost in fall usually comes around October 21. One year in ten it arrives before October 8.

How long is the growing season in Smyrna?

About 189 days between the average last and first frost.

When should I plant tomatoes in Smyrna?

Plant tomato seedlings outside from April 20 to May 4. Start seeds indoors six to eight weeks earlier.

Nearby in Tennessee

All 33 cities in Tennessee