Last frost date in Worcester, MA
The average last frost in Worcester is April 23. By May 5 the chance of another 32°F night drops to 1 in 10. The first fall frost usually arrives about October 21, which leaves 181 frost-free days. An early freeze before October 6 happens one year in ten.
- Safe after (10% risk)
- May 5
- Average first frost
- Oct 21
- Frost-free season
- 181 days
- Hard freeze (28°F) ends
- Apr 11
Frost likely Fri night, low 30°F
National Weather Service forecast, updated Oct 22, 12:24 UTC
- ThuOct 2235°possible frost
- FriOct 2330°frost
- SatOct 2432°frost
- SunOct 2536°possible frost
- MonOct 2643°
- TueOct 2737°
- WedOct 2839°
Planting calendar for Worcester
Windows count forward or back from the average frost dates above. Click a crop for dates across Massachusetts.
TomatoesApr 30–May 14
PumpkinsMay 7–May 21
SunflowersApr 23–May 14
CucumbersMay 7–May 14
CornApr 30–May 14
Sweet potatoesMay 14–May 28
WatermelonMay 7–May 21
Green beansApr 30–May 21
ZucchiniApr 30–May 14
OkraMay 14–May 28
PeppersMay 7–May 21
BasilApr 30–May 14
Butternut squashApr 30–May 14
CantaloupeMay 7–May 21
EggplantMay 7–May 21
PotatoesMar 26–Apr 9
OnionsMar 12–Apr 2
CarrotsApr 2–May 7
LettuceApr 9–Apr 30
BroccoliMar 26–Apr 9
BeetsMar 26–May 7
PeasMar 12–Mar 26
CabbageMar 26–Apr 9
RadishesMar 19–Apr 30
Brussels sproutsApr 9–Apr 23
SpinachMar 12–Apr 2
CilantroApr 9–Apr 30
KaleMar 26–Apr 9
Collard greensMar 26–Apr 9
TurnipsMar 26–Apr 9
DillApr 23–May 7
CeleryApr 30–May 7
CauliflowerApr 9–Apr 23
LeeksApr 9–Apr 23
Swiss chardApr 9–May 7
ParsleyApr 9–Apr 30
Tulip bulbsOct 7–Nov 11
GarlicSep 30–Nov 4
Daffodil bulbsSep 23–Nov 4
StrawberriesMar 26–Apr 9
AsparagusMar 26–Apr 9Frost probabilities
| Threshold | Spring, 90% chance later | Spring, 50% | Spring, 10% | Fall, 10% chance earlier | Fall, 50% | Fall, 90% |
|---|---|---|---|---|---|---|
| Light frost, 32°F | Apr 11 | Apr 23 | May 5 | Oct 6 | Oct 21 | Nov 3 |
| Hard freeze, 28°F | Apr 1 | Apr 11 | Apr 22 | Oct 17 | Nov 1 | Nov 15 |
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 Worcester Regional Airport (USW00094746) sits 3.3 miles from the center of Worcester at 1,000 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 Worcester, MA?
The average last frost date in Worcester is April 23, based on NOAA 1991–2020 climate normals. There is a 10% chance of frost after May 5.
When is the first frost in Worcester?
The first frost in fall usually comes around October 21. One year in ten it arrives before October 6.
How long is the growing season in Worcester?
About 181 days between the average last and first frost.
When should I plant tomatoes in Worcester?
Plant tomato seedlings outside from April 30 to May 14. Start seeds indoors six to eight weeks earlier.
Nearby in Massachusetts
- MarlboroughMay 2
- MilfordApr 30
- LeominsterApr 29
- FraminghamApr 26
- FitchburgMay 1
- GardnerMay 2
- Franklin TownApr 30
- WellesleyApr 26
- NeedhamApr 26
- WalthamApr 28
- NewtonApr 19
- NorwoodApr 25