Last frost date in Mount Vernon, NY

Average last frost
April 1

The average last frost in Mount Vernon is April 1. By April 12 the chance of another 32°F night drops to 1 in 10. The first fall frost usually arrives about November 16, which leaves 230 frost-free days. An early freeze before November 2 happens one year in ten.

Safe after (10% risk)
Apr 12
Average first frost
Nov 16
Frost-free season
230 days
Hard freeze (28°F) ends
Mar 23
Next 7 nights in Mount Vernon

No frost in the next 7 nights

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

  1. ThuOct 2242°
  2. FriOct 2339°
  3. SatOct 2439°
  4. SunOct 2543°
  5. MonOct 2648°
  6. TueOct 2746°
  7. WedOct 2847°
JanFebMarAprMayJunJulAugSepOctNovDecLast frost Apr 1First frost Nov 16230 frost-free daysBlue: chance of 32°F frost. Green: average frost-free season.JFMAMJJASOND230 frost-free days
Frost risk through the year at Bronx, 5.4 miles from Mount Vernon.

Planting calendar for Mount Vernon

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 8–Apr 22
PumpkinsApr 15–Apr 29
SunflowersApr 1–Apr 22
CucumbersApr 15–Apr 22
CornApr 8–Apr 22
Sweet potatoesApr 22–May 6
WatermelonApr 15–Apr 29
Green beansApr 8–Apr 29
ZucchiniApr 8–Apr 22
OkraApr 22–May 6
PeppersApr 15–Apr 29
BasilApr 8–Apr 22
Butternut squashApr 8–Apr 22
CantaloupeApr 15–Apr 29
EggplantApr 15–Apr 29
Cool-season crops
JanFebMarAprMayJunJulAugSepOctNovDec
PotatoesMar 4–Mar 18
OnionsFeb 18–Mar 11
CarrotsMar 11–Apr 15
LettuceMar 18–Apr 8
BroccoliMar 4–Mar 18
BeetsMar 4–Apr 15
PeasFeb 18–Mar 4
CabbageMar 4–Mar 18
RadishesFeb 25–Apr 8
Brussels sproutsMar 18–Apr 1
SpinachFeb 18–Mar 11
CilantroMar 18–Apr 8
KaleMar 4–Mar 18
Collard greensMar 4–Mar 18
TurnipsMar 4–Mar 18
DillApr 1–Apr 15
CeleryApr 8–Apr 15
CauliflowerMar 18–Apr 1
LeeksMar 18–Apr 1
Swiss chardMar 18–Apr 15
ParsleyMar 18–Apr 8
Fall bulbs and garlic
JanFebMarAprMayJunJulAugSepOctNovDec
Tulip bulbsNov 2–Dec 7
GarlicOct 26–Nov 30
Daffodil bulbsOct 19–Nov 30
Perennials
JanFebMarAprMayJunJulAugSepOctNovDec
StrawberriesMar 4–Mar 18
AsparagusMar 4–Mar 18

Frost probabilities

ThresholdSpring, 90% chance laterSpring, 50%Spring, 10%Fall, 10% chance earlierFall, 50%Fall, 90%
Light frost, 32°FMar 19Apr 1Apr 12Nov 2Nov 16Dec 4
Hard freeze, 28°FMar 8Mar 23Apr 3Nov 13Nov 30Dec 17

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 Bronx (USC00300961) sits 5.4 miles from the center of Mount Vernon at 39 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 Mount Vernon, NY?

The average last frost date in Mount Vernon is April 1, based on NOAA 1991–2020 climate normals. There is a 10% chance of frost after April 12.

When is the first frost in Mount Vernon?

The first frost in fall usually comes around November 16. One year in ten it arrives before November 2.

How long is the growing season in Mount Vernon?

About 230 days between the average last and first frost.

When should I plant tomatoes in Mount Vernon?

Plant tomato seedlings outside from April 8 to April 22. Start seeds indoors six to eight weeks earlier.

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