Last frost date in Jeffersontown, KY

Average last frost
April 3

Expect the last frost in Jeffersontown around April 3. Frost after April 19 happens in only one year out of ten. The first fall frost usually arrives about November 3, which leaves 214 frost-free days. An early freeze before October 21 happens one year in ten.

Safe after (10% risk)
Apr 19
Average first frost
Nov 3
Frost-free season
214 days
Hard freeze (28°F) ends
Mar 22
Next 7 nights in Jeffersontown

No frost in the next 7 nights

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

  1. ThuOct 2244°
  2. FriOct 2345°
  3. SatOct 2445°
  4. SunOct 2546°
  5. MonOct 2648°
  6. TueOct 2749°
  7. WedOct 2847°
JanFebMarAprMayJunJulAugSepOctNovDecLast frost Apr 3First frost Nov 3214 frost-free daysBlue: chance of 32°F frost. Green: average frost-free season.JFMAMJJASOND214 frost-free days
Frost risk through the year at Louisville Bowman Field, 5.3 miles from Jeffersontown.

Planting calendar for Jeffersontown

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

Start indoorsPlant outSow outdoorsFall plantingAverage last and first frost
Warm-season crops
JanFebMarAprMayJunJulAugSepOctNovDec
TomatoesApr 10–Apr 24
PumpkinsApr 17–May 1
SunflowersApr 3–Apr 24
CucumbersApr 17–Apr 24
CornApr 10–Apr 24
Sweet potatoesApr 24–May 8
WatermelonApr 17–May 1
Green beansApr 10–May 1
ZucchiniApr 10–Apr 24
OkraApr 24–May 8
PeppersApr 17–May 1
BasilApr 10–Apr 24
Butternut squashApr 10–Apr 24
CantaloupeApr 17–May 1
EggplantApr 17–May 1
Cool-season crops
JanFebMarAprMayJunJulAugSepOctNovDec
PotatoesMar 6–Mar 20
OnionsFeb 20–Mar 13
CarrotsMar 13–Apr 17
LettuceMar 20–Apr 10
BroccoliMar 6–Mar 20
BeetsMar 6–Apr 17
PeasFeb 20–Mar 6
CabbageMar 6–Mar 20
RadishesFeb 27–Apr 10
Brussels sproutsMar 20–Apr 3
SpinachFeb 20–Mar 13
CilantroMar 20–Apr 10
KaleMar 6–Mar 20
Collard greensMar 6–Mar 20
TurnipsMar 6–Mar 20
DillApr 3–Apr 17
CeleryApr 10–Apr 17
CauliflowerMar 20–Apr 3
LeeksMar 20–Apr 3
Swiss chardMar 20–Apr 17
ParsleyMar 20–Apr 10
Fall bulbs and garlic
JanFebMarAprMayJunJulAugSepOctNovDec
Tulip bulbsOct 20–Nov 24
GarlicOct 13–Nov 17
Daffodil bulbsOct 6–Nov 17
Perennials
JanFebMarAprMayJunJulAugSepOctNovDec
StrawberriesMar 6–Mar 20
AsparagusMar 6–Mar 20

Frost probabilities

ThresholdSpring, 90% chance laterSpring, 50%Spring, 10%Fall, 10% chance earlierFall, 50%Fall, 90%
Light frost, 32°FMar 18Apr 3Apr 19Oct 21Nov 3Nov 16
Hard freeze, 28°FMar 4Mar 22Apr 5Nov 1Nov 13Dec 1

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 Louisville Bowman Field (USW00013810) sits 5.3 miles from the center of Jeffersontown at 540 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 Jeffersontown, KY?

The average last frost date in Jeffersontown is April 3, based on NOAA 1991–2020 climate normals. There is a 10% chance of frost after April 19.

When is the first frost in Jeffersontown?

The first frost in fall usually comes around November 3. One year in ten it arrives before October 21.

How long is the growing season in Jeffersontown?

About 214 days between the average last and first frost.

When should I plant tomatoes in Jeffersontown?

Plant tomato seedlings outside from April 10 to April 24. Start seeds indoors six to eight weeks earlier.

Nearby in Kentucky

All 19 cities in Kentucky