Lynn, MA 01902 Frost Dates
01902, near Lynn, MA: the frost window
Around 04/25 is the usual last spring frost, about 240 days away. Fall's first freeze usually shows up around 10/20, roughly 176 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Lynn in Zone 7a (0 to 5°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
Lynn's growing season runs out in roughly 8 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
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 04/12 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/13 and only about 1 year in 10 sees frost after that.
Lynn against the rest of the dataset
About 176 days separate Lynn's last and first frost, putting it 26,325 of 40,283 ZIP codes nationally. Within MA, it ranks 293 of 712.
Learn more
Two guides worth reading on 01902: the frost range, on how to read the range around Lynn's dates instead of trusting one, and local microclimates, on what one yard in Lynn can differ from the 01902 normal.