Woburn, MA 01889 Frost Dates
Woburn, MA: when does the frost end?
Typically, the last spring freeze lands around 04/25, roughly 240 days out. Fall's first freeze usually shows up around 10/17, roughly 174 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Woburn in Zone 6b (-5 to 0°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
With roughly 7 weeks until Woburn's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/25 isn't a guarantee
04/25 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/13 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/08 and only about 1 year in 10 sees frost after that.
Woburn against the rest of the dataset
Woburn's growing season runs about 174 days, ranking 27,338 of 40,283 US ZIP codes measured here, longest to shortest. Within MA, it ranks 311 of 712.
Learn more
Before leaning on 01889's figures: local microclimates explains what one yard in Woburn can differ from the 01889 normal, while zone vs. frost date explains why Zone 6b and Woburn's frost date answer different questions.