Worcester, MA 01509 Frost Dates
Worcester, MA: when does the frost end?
Typically, the last spring freeze lands around 04/23, roughly 238 days out. Fall's first freeze usually shows up around 10/21, roughly 181 days after the last spring frost.
Worcester sits in USDA Zone 6b (-5 to 0°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
Stretching the season past the first frost
With roughly 8 weeks until Worcester's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
04/23 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/11 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/05 and only about 1 year in 10 sees frost after that.
Worcester against the rest of the dataset
At roughly 181 frost-free days, Worcester places 24,376 of 40,283 ZIP codes in this dataset. Within MA, it ranks 201 of 712.
Learn more
Before leaning on 01509's figures: local microclimates explains what one yard in Worcester can differ from the 01509 normal, while zone vs. frost date explains why Zone 6b and Worcester's frost date answer different questions.