Last frost date in Clarksville, IN

Average last frost
March 31

The average last frost in Clarksville is March 31. By April 14 the chance of another 32°F night drops to 1 in 10. The first fall frost usually arrives about November 9, which leaves 225 frost-free days. An early freeze before October 31 happens one year in ten.

Safe after (10% risk)
Apr 14
Average first frost
Nov 9
Frost-free season
225 days
Hard freeze (28°F) ends
Mar 18
Next 7 nights in Clarksville

No frost in the next 7 nights

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

  1. ThuOct 2243°
  2. FriOct 2344°
  3. SatOct 2444°
  4. SunOct 2545°
  5. MonOct 2647°
  6. TueOct 2748°
  7. WedOct 2846°
JanFebMarAprMayJunJulAugSepOctNovDecLast frost Mar 31First frost Nov 9225 frost-free daysBlue: chance of 32°F frost. Green: average frost-free season.JFMAMJJASOND225 frost-free days
Frost risk through the year at Louisville Mcalpine, 3.3 miles from Clarksville.

Planting calendar for Clarksville

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

Start indoorsPlant outSow outdoorsFall plantingAverage last and first frost
Warm-season crops
JanFebMarAprMayJunJulAugSepOctNovDec
TomatoesApr 7–Apr 21
PumpkinsApr 14–Apr 28
SunflowersMar 31–Apr 21
CucumbersApr 14–Apr 21
CornApr 7–Apr 21
Sweet potatoesApr 21–May 5
WatermelonApr 14–Apr 28
Green beansApr 7–Apr 28
ZucchiniApr 7–Apr 21
OkraApr 21–May 5
PeppersApr 14–Apr 28
BasilApr 7–Apr 21
Butternut squashApr 7–Apr 21
CantaloupeApr 14–Apr 28
EggplantApr 14–Apr 28
Cool-season crops
JanFebMarAprMayJunJulAugSepOctNovDec
PotatoesMar 3–Mar 17
OnionsFeb 17–Mar 10
CarrotsMar 10–Apr 14
LettuceMar 17–Apr 7
BroccoliMar 3–Mar 17
BeetsMar 3–Apr 14
PeasFeb 17–Mar 3
CabbageMar 3–Mar 17
RadishesFeb 24–Apr 7
Brussels sproutsMar 17–Mar 31
SpinachFeb 17–Mar 10
CilantroMar 17–Apr 7
KaleMar 3–Mar 17
Collard greensMar 3–Mar 17
TurnipsMar 3–Mar 17
DillMar 31–Apr 14
CeleryApr 7–Apr 14
CauliflowerMar 17–Mar 31
LeeksMar 17–Mar 31
Swiss chardMar 17–Apr 14
ParsleyMar 17–Apr 7
Fall bulbs and garlic
JanFebMarAprMayJunJulAugSepOctNovDec
Tulip bulbsOct 26–Nov 30
GarlicOct 19–Nov 23
Daffodil bulbsOct 12–Nov 23
Perennials
JanFebMarAprMayJunJulAugSepOctNovDec
StrawberriesMar 3–Mar 17
AsparagusMar 3–Mar 17

Frost probabilities

ThresholdSpring, 90% chance laterSpring, 50%Spring, 10%Fall, 10% chance earlierFall, 50%Fall, 90%
Light frost, 32°FMar 14Mar 31Apr 14Oct 31Nov 9Nov 25
Hard freeze, 28°FFeb 28Mar 18Apr 2Nov 5Nov 20Dec 6

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 Mcalpine (USC00154955) sits 3.3 miles from the center of Clarksville at 440 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 Clarksville, IN?

The average last frost date in Clarksville is March 31, based on NOAA 1991–2020 climate normals. There is a 10% chance of frost after April 14.

When is the first frost in Clarksville?

The first frost in fall usually comes around November 9. One year in ten it arrives before October 31.

How long is the growing season in Clarksville?

About 225 days between the average last and first frost.

When should I plant tomatoes in Clarksville?

Plant tomato seedlings outside from April 7 to April 21. Start seeds indoors six to eight weeks earlier.

Nearby in Indiana

All 49 cities in Indiana