Last frost date in Hawthorne, NJ
The average last frost in Hawthorne is April 15. By May 1 the chance of another 32°F night drops to 1 in 10. The first fall frost usually arrives about October 28, which leaves 195 frost-free days. An early freeze before October 13 happens one year in ten.
- Safe after (10% risk)
- May 1
- Average first frost
- Oct 28
- Frost-free season
- 195 days
- Hard freeze (28°F) ends
- Apr 2
Frost possible in low spots Fri night, low 36°F
National Weather Service forecast, updated Oct 22, 12:57 UTC
- ThuOct 2241°
- FriOct 2336°possible frost
- SatOct 2437°
- SunOct 2540°
- MonOct 2646°
- TueOct 2744°
- WedOct 2845°
Planting calendar for Hawthorne
Windows count forward or back from the average frost dates above. Click a crop for dates across New Jersey.
TomatoesApr 22–May 6
PumpkinsApr 29–May 13
SunflowersApr 15–May 6
CucumbersApr 29–May 6
CornApr 22–May 6
Sweet potatoesMay 6–May 20
WatermelonApr 29–May 13
Green beansApr 22–May 13
ZucchiniApr 22–May 6
OkraMay 6–May 20
PeppersApr 29–May 13
BasilApr 22–May 6
Butternut squashApr 22–May 6
CantaloupeApr 29–May 13
EggplantApr 29–May 13
PotatoesMar 18–Apr 1
OnionsMar 4–Mar 25
CarrotsMar 25–Apr 29
LettuceApr 1–Apr 22
BroccoliMar 18–Apr 1
BeetsMar 18–Apr 29
PeasMar 4–Mar 18
CabbageMar 18–Apr 1
RadishesMar 11–Apr 22
Brussels sproutsApr 1–Apr 15
SpinachMar 4–Mar 25
CilantroApr 1–Apr 22
KaleMar 18–Apr 1
Collard greensMar 18–Apr 1
TurnipsMar 18–Apr 1
DillApr 15–Apr 29
CeleryApr 22–Apr 29
CauliflowerApr 1–Apr 15
LeeksApr 1–Apr 15
Swiss chardApr 1–Apr 29
ParsleyApr 1–Apr 22
Tulip bulbsOct 14–Nov 18
GarlicOct 7–Nov 11
Daffodil bulbsSep 30–Nov 11
StrawberriesMar 18–Apr 1
AsparagusMar 18–Apr 1Frost probabilities
| Threshold | Spring, 90% chance later | Spring, 50% | Spring, 10% | Fall, 10% chance earlier | Fall, 50% | Fall, 90% |
|---|---|---|---|---|---|---|
| Light frost, 32°F | Apr 1 | Apr 15 | May 1 | Oct 13 | Oct 28 | Nov 9 |
| Hard freeze, 28°F | Mar 18 | Apr 2 | Apr 16 | Oct 24 | Nov 7 | Nov 22 |
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 Little Falls (USC00284887) sits 6.1 miles from the center of Hawthorne at 150 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 Hawthorne, NJ?
The average last frost date in Hawthorne is April 15, based on NOAA 1991–2020 climate normals. There is a 10% chance of frost after May 1.
When is the first frost in Hawthorne?
The first frost in fall usually comes around October 28. One year in ten it arrives before October 13.
How long is the growing season in Hawthorne?
About 195 days between the average last and first frost.
When should I plant tomatoes in Hawthorne?
Plant tomato seedlings outside from April 22 to May 6. Start seeds indoors six to eight weeks earlier.
Nearby in New Jersey
- Fair LawnApr 3
- RidgewoodApr 15
- PatersonApr 15
- Elmwood ParkApr 3
- ParamusApr 3
- GarfieldApr 3
- CliftonApr 15
- LodiApr 3
- PassaicApr 3
- HackensackApr 3
- BergenfieldApr 3
- EnglewoodApr 3