Last frost date in Union City, NJ

Average last frost
March 30

In Union City, the last spring frost comes around March 30 in an average year. Wait until April 9 if you want 90% odds of no more frost. The first fall frost usually arrives about November 20, which leaves 236 frost-free days. An early freeze before November 6 happens one year in ten.

Safe after (10% risk)
Apr 9
Average first frost
Nov 20
Frost-free season
236 days
Hard freeze (28°F) ends
Mar 19
Next 7 nights in Union City

No frost in the next 7 nights

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

  1. ThuOct 2245°
  2. FriOct 2341°
  3. SatOct 2442°
  4. SunOct 2544°
  5. MonOct 2650°
  6. TueOct 2749°
  7. WedOct 2849°
JanFebMarAprMayJunJulAugSepOctNovDecLast frost Mar 30First frost Nov 20236 frost-free daysBlue: chance of 32°F frost. Green: average frost-free season.JFMAMJJASOND236 frost-free days
Frost risk through the year at NEW York Central Park Tower, 3.4 miles from Union City.

Planting calendar for Union City

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

Start indoorsPlant outSow outdoorsFall plantingAverage last and first frost
Warm-season crops
JanFebMarAprMayJunJulAugSepOctNovDec
TomatoesApr 6–Apr 20
PumpkinsApr 13–Apr 27
SunflowersMar 30–Apr 20
CucumbersApr 13–Apr 20
CornApr 6–Apr 20
Sweet potatoesApr 20–May 4
WatermelonApr 13–Apr 27
Green beansApr 6–Apr 27
ZucchiniApr 6–Apr 20
OkraApr 20–May 4
PeppersApr 13–Apr 27
BasilApr 6–Apr 20
Butternut squashApr 6–Apr 20
CantaloupeApr 13–Apr 27
EggplantApr 13–Apr 27
Cool-season crops
JanFebMarAprMayJunJulAugSepOctNovDec
PotatoesMar 2–Mar 16
OnionsFeb 16–Mar 9
CarrotsMar 9–Apr 13
LettuceMar 16–Apr 6
BroccoliMar 2–Mar 16
BeetsMar 2–Apr 13
PeasFeb 16–Mar 2
CabbageMar 2–Mar 16
RadishesFeb 23–Apr 6
Brussels sproutsMar 16–Mar 30
SpinachFeb 16–Mar 9
CilantroMar 16–Apr 6
KaleMar 2–Mar 16
Collard greensMar 2–Mar 16
TurnipsMar 2–Mar 16
DillMar 30–Apr 13
CeleryApr 6–Apr 13
CauliflowerMar 16–Mar 30
LeeksMar 16–Mar 30
Swiss chardMar 16–Apr 13
ParsleyMar 16–Apr 6
Fall bulbs and garlic
JanFebMarAprMayJunJulAugSepOctNovDec
Tulip bulbsNov 6–Dec 11
GarlicOct 15–Nov 30
Daffodil bulbsOct 15–Nov 30
Perennials
JanFebMarAprMayJunJulAugSepOctNovDec
StrawberriesMar 2–Mar 16
AsparagusMar 2–Mar 16

Frost probabilities

ThresholdSpring, 90% chance laterSpring, 50%Spring, 10%Fall, 10% chance earlierFall, 50%Fall, 90%
Light frost, 32°FMar 14Mar 30Apr 9Nov 6Nov 20Dec 6
Hard freeze, 28°FMar 5Mar 19Apr 2Nov 15Dec 1Dec 16

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 NEW York Central Park Tower (USW00094728) sits 3.4 miles from the center of Union City at 130 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 Union City, NJ?

The average last frost date in Union City is March 30, based on NOAA 1991–2020 climate normals. There is a 10% chance of frost after April 9.

When is the first frost in Union City?

The first frost in fall usually comes around November 20. One year in ten it arrives before November 6.

How long is the growing season in Union City?

About 236 days between the average last and first frost.

When should I plant tomatoes in Union City?

Plant tomato seedlings outside from April 6 to April 20. Start seeds indoors six to eight weeks earlier.

Nearby in New Jersey

All 59 cities in New Jersey