Last frost date in Miamisburg, OH

Average last frost
April 17

The average last frost in Miamisburg is April 17. By May 6 the chance of another 32°F night drops to 1 in 10. The first fall frost usually arrives about October 26, which leaves 192 frost-free days. An early freeze before October 13 happens one year in ten.

Safe after (10% risk)
May 6
Average first frost
Oct 26
Frost-free season
192 days
Hard freeze (28°F) ends
Apr 5
Next 7 nights in Miamisburg

No frost in the next 7 nights

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

  1. ThuOct 2244°
  2. FriOct 2342°
  3. SatOct 2443°
  4. SunOct 2544°
  5. MonOct 2647°
  6. TueOct 2748°
  7. WedOct 2845°
JanFebMarAprMayJunJulAugSepOctNovDecLast frost Apr 17First frost Oct 26192 frost-free daysBlue: chance of 32°F frost. Green: average frost-free season.JFMAMJJASOND192 frost-free days
Frost risk through the year at Dayton Wright Bros Airport, 3.5 miles from Miamisburg.

Planting calendar for Miamisburg

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

Start indoorsPlant outSow outdoorsFall plantingAverage last and first frost
Warm-season crops
JanFebMarAprMayJunJulAugSepOctNovDec
TomatoesApr 24–May 8
PumpkinsMay 1–May 15
SunflowersApr 17–May 8
CucumbersMay 1–May 8
CornApr 24–May 8
Sweet potatoesMay 8–May 22
WatermelonMay 1–May 15
Green beansApr 24–May 15
ZucchiniApr 24–May 8
OkraMay 8–May 22
PeppersMay 1–May 15
BasilApr 24–May 8
Butternut squashApr 24–May 8
CantaloupeMay 1–May 15
EggplantMay 1–May 15
Cool-season crops
JanFebMarAprMayJunJulAugSepOctNovDec
PotatoesMar 20–Apr 3
OnionsMar 6–Mar 27
CarrotsMar 27–May 1
LettuceApr 3–Apr 24
BroccoliMar 20–Apr 3
BeetsMar 20–May 1
PeasMar 6–Mar 20
CabbageMar 20–Apr 3
RadishesMar 13–Apr 24
Brussels sproutsApr 3–Apr 17
SpinachMar 6–Mar 27
CilantroApr 3–Apr 24
KaleMar 20–Apr 3
Collard greensMar 20–Apr 3
TurnipsMar 20–Apr 3
DillApr 17–May 1
CeleryApr 24–May 1
CauliflowerApr 3–Apr 17
LeeksApr 3–Apr 17
Swiss chardApr 3–May 1
ParsleyApr 3–Apr 24
Fall bulbs and garlic
JanFebMarAprMayJunJulAugSepOctNovDec
Tulip bulbsOct 12–Nov 16
GarlicOct 5–Nov 9
Daffodil bulbsSep 28–Nov 9
Perennials
JanFebMarAprMayJunJulAugSepOctNovDec
StrawberriesMar 20–Apr 3
AsparagusMar 20–Apr 3

Frost probabilities

ThresholdSpring, 90% chance laterSpring, 50%Spring, 10%Fall, 10% chance earlierFall, 50%Fall, 90%
Light frost, 32°FApr 3Apr 17May 6Oct 13Oct 26Nov 6
Hard freeze, 28°FMar 20Apr 5Apr 21Oct 23Nov 5Nov 20

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 Dayton Wright Bros Airport (USW00053859) sits 3.5 miles from the center of Miamisburg at 962 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 Miamisburg, OH?

The average last frost date in Miamisburg is April 17, based on NOAA 1991–2020 climate normals. There is a 10% chance of frost after May 6.

When is the first frost in Miamisburg?

The first frost in fall usually comes around October 26. One year in ten it arrives before October 13.

How long is the growing season in Miamisburg?

About 192 days between the average last and first frost.

When should I plant tomatoes in Miamisburg?

Plant tomato seedlings outside from April 24 to May 8. Start seeds indoors six to eight weeks earlier.

Nearby in Ohio

All 87 cities in Ohio