Last frost date in Seymour, IN

Average last frost
April 16

In Seymour, the last spring frost comes around April 16 in an average year. Wait until May 2 if you want 90% odds of no more frost. The first fall frost usually arrives about October 21, which leaves 187 frost-free days. An early freeze before October 7 happens one year in ten.

Safe after (10% risk)
May 2
Average first frost
Oct 21
Frost-free season
187 days
Hard freeze (28°F) ends
Apr 2
Next 7 nights in Seymour

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 2242°
  2. FriOct 2342°
  3. SatOct 2442°
  4. SunOct 2543°
  5. MonOct 2646°
  6. TueOct 2747°
  7. WedOct 2844°
JanFebMarAprMayJunJulAugSepOctNovDecLast frost Apr 16First frost Oct 21187 frost-free daysBlue: chance of 32°F frost. Green: average frost-free season.JFMAMJJASOND187 frost-free days
Frost risk through the year at Seymour 2 N, 2.5 miles from Seymour.

Planting calendar for Seymour

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 23–May 7
PumpkinsApr 30–May 14
SunflowersApr 16–May 7
CucumbersApr 30–May 7
CornApr 23–May 7
Sweet potatoesMay 7–May 21
WatermelonApr 30–May 14
Green beansApr 23–May 14
ZucchiniApr 23–May 7
OkraMay 7–May 21
PeppersApr 30–May 14
BasilApr 23–May 7
Butternut squashApr 23–May 7
CantaloupeApr 30–May 14
EggplantApr 30–May 14
Cool-season crops
JanFebMarAprMayJunJulAugSepOctNovDec
PotatoesMar 19–Apr 2
OnionsMar 5–Mar 26
CarrotsMar 26–Apr 30
LettuceApr 2–Apr 23
BroccoliMar 19–Apr 2
BeetsMar 19–Apr 30
PeasMar 5–Mar 19
CabbageMar 19–Apr 2
RadishesMar 12–Apr 23
Brussels sproutsApr 2–Apr 16
SpinachMar 5–Mar 26
CilantroApr 2–Apr 23
KaleMar 19–Apr 2
Collard greensMar 19–Apr 2
TurnipsMar 19–Apr 2
DillApr 16–Apr 30
CeleryApr 23–Apr 30
CauliflowerApr 2–Apr 16
LeeksApr 2–Apr 16
Swiss chardApr 2–Apr 30
ParsleyApr 2–Apr 23
Fall bulbs and garlic
JanFebMarAprMayJunJulAugSepOctNovDec
Tulip bulbsOct 7–Nov 11
GarlicSep 30–Nov 4
Daffodil bulbsSep 23–Nov 4
Perennials
JanFebMarAprMayJunJulAugSepOctNovDec
StrawberriesMar 19–Apr 2
AsparagusMar 19–Apr 2

Frost probabilities

ThresholdSpring, 90% chance laterSpring, 50%Spring, 10%Fall, 10% chance earlierFall, 50%Fall, 90%
Light frost, 32°FApr 2Apr 16May 2Oct 7Oct 21Nov 1
Hard freeze, 28°FMar 19Apr 2Apr 19Oct 19Nov 1Nov 14

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 Seymour 2 N (USC00127935) sits 2.5 miles from the center of Seymour at 570 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 Seymour, IN?

The average last frost date in Seymour is April 16, based on NOAA 1991–2020 climate normals. There is a 10% chance of frost after May 2.

When is the first frost in Seymour?

The first frost in fall usually comes around October 21. One year in ten it arrives before October 7.

How long is the growing season in Seymour?

About 187 days between the average last and first frost.

When should I plant tomatoes in Seymour?

Plant tomato seedlings outside from April 23 to May 7. Start seeds indoors six to eight weeks earlier.

Nearby in Indiana

All 49 cities in Indiana