Last frost date in Rockville Centre, NY

Average last frost
April 7

Expect the last frost in Rockville Centre around April 7. Frost after April 26 happens in only one year out of ten. The first fall frost usually arrives about November 8, which leaves 212 frost-free days. An early freeze before October 27 happens one year in ten.

Safe after (10% risk)
Apr 26
Average first frost
Nov 8
Frost-free season
212 days
Hard freeze (28°F) ends
Mar 27
Next 7 nights in Rockville Centre

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 2546°
  5. MonOct 2650°
  6. TueOct 2749°
  7. WedOct 2850°
JanFebMarAprMayJunJulAugSepOctNovDecLast frost Apr 7First frost Nov 8212 frost-free daysBlue: chance of 32°F frost. Green: average frost-free season.JFMAMJJASOND212 frost-free days
Frost risk through the year at Oceanside, 2.2 miles from Rockville Centre.

Planting calendar for Rockville Centre

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

Start indoorsPlant outSow outdoorsFall plantingAverage last and first frost
Warm-season crops
JanFebMarAprMayJunJulAugSepOctNovDec
TomatoesApr 14–Apr 28
PumpkinsApr 21–May 5
SunflowersApr 7–Apr 28
CucumbersApr 21–Apr 28
CornApr 14–Apr 28
Sweet potatoesApr 28–May 12
WatermelonApr 21–May 5
Green beansApr 14–May 5
ZucchiniApr 14–Apr 28
OkraApr 28–May 12
PeppersApr 21–May 5
BasilApr 14–Apr 28
Butternut squashApr 14–Apr 28
CantaloupeApr 21–May 5
EggplantApr 21–May 5
Cool-season crops
JanFebMarAprMayJunJulAugSepOctNovDec
PotatoesMar 10–Mar 24
OnionsFeb 24–Mar 17
CarrotsMar 17–Apr 21
LettuceMar 24–Apr 14
BroccoliMar 10–Mar 24
BeetsMar 10–Apr 21
PeasFeb 24–Mar 10
CabbageMar 10–Mar 24
RadishesMar 3–Apr 14
Brussels sproutsMar 24–Apr 7
SpinachFeb 24–Mar 17
CilantroMar 24–Apr 14
KaleMar 10–Mar 24
Collard greensMar 10–Mar 24
TurnipsMar 10–Mar 24
DillApr 7–Apr 21
CeleryApr 14–Apr 21
CauliflowerMar 24–Apr 7
LeeksMar 24–Apr 7
Swiss chardMar 24–Apr 21
ParsleyMar 24–Apr 14
Fall bulbs and garlic
JanFebMarAprMayJunJulAugSepOctNovDec
Tulip bulbsOct 25–Nov 29
GarlicOct 18–Nov 22
Daffodil bulbsOct 11–Nov 22
Perennials
JanFebMarAprMayJunJulAugSepOctNovDec
StrawberriesMar 10–Mar 24
AsparagusMar 10–Mar 24

Frost probabilities

ThresholdSpring, 90% chance laterSpring, 50%Spring, 10%Fall, 10% chance earlierFall, 50%Fall, 90%
Light frost, 32°FMar 24Apr 7Apr 26Oct 27Nov 8Nov 23
Hard freeze, 28°FMar 10Mar 27Apr 9Nov 7Nov 21Dec 7

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 Oceanside (USC00306138) sits 2.2 miles from the center of Rockville Centre at 12 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 Rockville Centre, NY?

The average last frost date in Rockville Centre is April 7, based on NOAA 1991–2020 climate normals. There is a 10% chance of frost after April 26.

When is the first frost in Rockville Centre?

The first frost in fall usually comes around November 8. One year in ten it arrives before October 27.

How long is the growing season in Rockville Centre?

About 212 days between the average last and first frost.

When should I plant tomatoes in Rockville Centre?

Plant tomato seedlings outside from April 14 to April 28. Start seeds indoors six to eight weeks earlier.

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