Last frost date in Jamestown, NY

Average last frost
May 8

The average last frost in Jamestown is May 8. By May 25 the chance of another 32°F night drops to 1 in 10. The first fall frost usually arrives about October 13, which leaves 158 frost-free days. An early freeze before October 1 happens one year in ten.

Safe after (10% risk)
May 25
Average first frost
Oct 13
Frost-free season
158 days
Hard freeze (28°F) ends
Apr 25
Next 7 nights in Jamestown

Hard freeze likely Fri night, low 27°F

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

  1. ThuOct 2235°possible frost
  2. FriOct 2327°hard freeze
  3. SatOct 2428°hard freeze
  4. SunOct 2537°
  5. MonOct 2640°
  6. TueOct 2739°
  7. WedOct 2839°
JanFebMarAprMayJunJulAugSepOctNovDecLast frost May 8First frost Oct 13158 frost-free daysBlue: chance of 32°F frost. Green: average frost-free season.JFMAMJJASOND158 frost-free days
Frost risk through the year at Jamestown 4 ENE, 4.0 miles from Jamestown.

Planting calendar for Jamestown

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
TomatoesMay 15–May 29
PumpkinsMay 22–Jun 5
SunflowersMay 8–May 29
CucumbersMay 22–May 29
CornMay 15–May 29
Sweet potatoesMay 29–Jun 12
WatermelonMay 22–Jun 5
Green beansMay 15–Jun 5
ZucchiniMay 15–May 29
OkraMay 29–Jun 12
PeppersMay 22–Jun 5
BasilMay 15–May 29
Butternut squashMay 15–May 29
CantaloupeMay 22–Jun 5
EggplantMay 22–Jun 5
Cool-season crops
JanFebMarAprMayJunJulAugSepOctNovDec
PotatoesApr 10–Apr 24
OnionsMar 27–Apr 17
CarrotsApr 17–May 22
LettuceApr 24–May 15
BroccoliApr 10–Apr 24
BeetsApr 10–May 22
PeasMar 27–Apr 10
CabbageApr 10–Apr 24
RadishesApr 3–May 15
Brussels sproutsApr 24–May 8
SpinachMar 27–Apr 17
CilantroApr 24–May 15
KaleApr 10–Apr 24
Collard greensApr 10–Apr 24
TurnipsApr 10–Apr 24
DillMay 8–May 22
CeleryMay 15–May 22
CauliflowerApr 24–May 8
LeeksApr 24–May 8
Swiss chardApr 24–May 22
ParsleyApr 24–May 15
Fall bulbs and garlic
JanFebMarAprMayJunJulAugSepOctNovDec
Tulip bulbsSep 29–Nov 3
GarlicSep 22–Oct 27
Daffodil bulbsSep 15–Oct 27
Perennials
JanFebMarAprMayJunJulAugSepOctNovDec
StrawberriesApr 10–Apr 24
AsparagusApr 10–Apr 24

Frost probabilities

ThresholdSpring, 90% chance laterSpring, 50%Spring, 10%Fall, 10% chance earlierFall, 50%Fall, 90%
Light frost, 32°FApr 22May 8May 25Oct 1Oct 13Oct 30
Hard freeze, 28°FApr 9Apr 25May 13Oct 10Oct 28Nov 12

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 Jamestown 4 ENE (USC00304207) sits 4.0 miles from the center of Jamestown at 1,250 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 Jamestown, NY?

The average last frost date in Jamestown is May 8, based on NOAA 1991–2020 climate normals. There is a 10% chance of frost after May 25.

When is the first frost in Jamestown?

The first frost in fall usually comes around October 13. One year in ten it arrives before October 1.

How long is the growing season in Jamestown?

About 158 days between the average last and first frost.

When should I plant tomatoes in Jamestown?

Plant tomato seedlings outside from May 15 to May 29. Start seeds indoors six to eight weeks earlier.

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