Last frost date in Rocky River, OH

Average last frost
April 20

The average last frost in Rocky River is April 20. By May 5 the chance of another 32°F night drops to 1 in 10. The first fall frost usually arrives about November 3, which leaves 198 frost-free days. An early freeze before October 21 happens one year in ten.

Safe after (10% risk)
May 5
Average first frost
Nov 3
Frost-free season
198 days
Hard freeze (28°F) ends
Apr 5
Next 7 nights in Rocky River

No frost in the next 7 nights

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

  1. ThuOct 2244°
  2. FriOct 2339°
  3. SatOct 2441°
  4. SunOct 2547°
  5. MonOct 2649°
  6. TueOct 2747°
  7. WedOct 2846°
JanFebMarAprMayJunJulAugSepOctNovDecLast frost Apr 20First frost Nov 3198 frost-free daysBlue: chance of 32°F frost. Green: average frost-free season.JFMAMJJASOND198 frost-free days
Frost risk through the year at Cleveland, 4.2 miles from Rocky River.

Planting calendar for Rocky River

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 27–May 11
PumpkinsMay 4–May 18
SunflowersApr 20–May 11
CucumbersMay 4–May 11
CornApr 27–May 11
Sweet potatoesMay 11–May 25
WatermelonMay 4–May 18
Green beansApr 27–May 18
ZucchiniApr 27–May 11
OkraMay 11–May 25
PeppersMay 4–May 18
BasilApr 27–May 11
Butternut squashApr 27–May 11
CantaloupeMay 4–May 18
EggplantMay 4–May 18
Cool-season crops
JanFebMarAprMayJunJulAugSepOctNovDec
PotatoesMar 23–Apr 6
OnionsMar 9–Mar 30
CarrotsMar 30–May 4
LettuceApr 6–Apr 27
BroccoliMar 23–Apr 6
BeetsMar 23–May 4
PeasMar 9–Mar 23
CabbageMar 23–Apr 6
RadishesMar 16–Apr 27
Brussels sproutsApr 6–Apr 20
SpinachMar 9–Mar 30
CilantroApr 6–Apr 27
KaleMar 23–Apr 6
Collard greensMar 23–Apr 6
TurnipsMar 23–Apr 6
DillApr 20–May 4
CeleryApr 27–May 4
CauliflowerApr 6–Apr 20
LeeksApr 6–Apr 20
Swiss chardApr 6–May 4
ParsleyApr 6–Apr 27
Fall bulbs and garlic
JanFebMarAprMayJunJulAugSepOctNovDec
Tulip bulbsOct 20–Nov 24
GarlicOct 13–Nov 17
Daffodil bulbsOct 6–Nov 17
Perennials
JanFebMarAprMayJunJulAugSepOctNovDec
StrawberriesMar 23–Apr 6
AsparagusMar 23–Apr 6

Frost probabilities

ThresholdSpring, 90% chance laterSpring, 50%Spring, 10%Fall, 10% chance earlierFall, 50%Fall, 90%
Light frost, 32°FApr 4Apr 20May 5Oct 21Nov 3Nov 17
Hard freeze, 28°FMar 22Apr 5Apr 21Nov 1Nov 13Nov 29

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 Cleveland (USW00014820) sits 4.2 miles from the center of Rocky River at 763 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 Rocky River, OH?

The average last frost date in Rocky River is April 20, based on NOAA 1991–2020 climate normals. There is a 10% chance of frost after May 5.

When is the first frost in Rocky River?

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 Rocky River?

About 198 days between the average last and first frost.

When should I plant tomatoes in Rocky River?

Plant tomato seedlings outside from April 27 to May 11. Start seeds indoors six to eight weeks earlier.

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