Last frost date in Glassboro, NJ
Expect the last frost in Glassboro around April 8. Frost after April 22 happens in only one year out of ten. The first fall frost usually arrives about November 1, which leaves 205 frost-free days. An early freeze before October 18 happens one year in ten.
- Safe after (10% risk)
- Apr 22
- Average first frost
- Nov 1
- Frost-free season
- 205 days
- Hard freeze (28°F) ends
- Mar 27
Frost possible in low spots Fri night, low 35°F
Earlier than usual: the average first frost here is November 1.
National Weather Service forecast, updated Oct 22, 12:57 UTC
- ThuOct 2242°
- FriOct 2335°possible frost
- SatOct 2436°possible frost
- SunOct 2539°
- MonOct 2645°
- TueOct 2746°
- WedOct 2846°
Planting calendar for Glassboro
Windows count forward or back from the average frost dates above. Click a crop for dates across New Jersey.
TomatoesApr 15–Apr 29
PumpkinsApr 22–May 6
SunflowersApr 8–Apr 29
CucumbersApr 22–Apr 29
CornApr 15–Apr 29
Sweet potatoesApr 29–May 13
WatermelonApr 22–May 6
Green beansApr 15–May 6
ZucchiniApr 15–Apr 29
OkraApr 29–May 13
PeppersApr 22–May 6
BasilApr 15–Apr 29
Butternut squashApr 15–Apr 29
CantaloupeApr 22–May 6
EggplantApr 22–May 6
PotatoesMar 11–Mar 25
OnionsFeb 25–Mar 18
CarrotsMar 18–Apr 22
LettuceMar 25–Apr 15
BroccoliMar 11–Mar 25
BeetsMar 11–Apr 22
PeasFeb 25–Mar 11
CabbageMar 11–Mar 25
RadishesMar 4–Apr 15
Brussels sproutsMar 25–Apr 8
SpinachFeb 25–Mar 18
CilantroMar 25–Apr 15
KaleMar 11–Mar 25
Collard greensMar 11–Mar 25
TurnipsMar 11–Mar 25
DillApr 8–Apr 22
CeleryApr 15–Apr 22
CauliflowerMar 25–Apr 8
LeeksMar 25–Apr 8
Swiss chardMar 25–Apr 22
ParsleyMar 25–Apr 15
Tulip bulbsOct 18–Nov 22
GarlicOct 11–Nov 15
Daffodil bulbsOct 4–Nov 15
StrawberriesMar 11–Mar 25
AsparagusMar 11–Mar 25Frost probabilities
| Threshold | Spring, 90% chance later | Spring, 50% | Spring, 10% | Fall, 10% chance earlier | Fall, 50% | Fall, 90% |
|---|---|---|---|---|---|---|
| Light frost, 32°F | Mar 27 | Apr 8 | Apr 22 | Oct 18 | Nov 1 | Nov 15 |
| Hard freeze, 28°F | Mar 12 | Mar 27 | Apr 9 | Oct 30 | Nov 11 | Nov 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 Glassboro 2 NE (USC00283291) sits 2.6 miles from the center of Glassboro at 100 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 Glassboro, NJ?
The average last frost date in Glassboro is April 8, based on NOAA 1991–2020 climate normals. There is a 10% chance of frost after April 22.
When is the first frost in Glassboro?
The first frost in fall usually comes around November 1. One year in ten it arrives before October 18.
How long is the growing season in Glassboro?
About 205 days between the average last and first frost.
When should I plant tomatoes in Glassboro?
Plant tomato seedlings outside from April 15 to April 29. Start seeds indoors six to eight weeks earlier.
Nearby in New Jersey
- SicklervilleApr 8
- LindenwoldApr 8
- CamdenMar 30
- VinelandApr 24
- BridgetonApr 10
- MillvilleApr 24
- PleasantvilleMar 26
- TrentonApr 17
- Atlantic CityMar 26
- PrincetonApr 25
- Toms RiverApr 23
- LakewoodApr 23