Lynn, MA 01901 Frost Dates
When can you plant in Lynn, MA?
Typically, the last spring freeze lands around 04/25, roughly 240 days out. The first fall frost typically arrives around 10/20, about 176 frost-free days later.
Zone 7a (0 to 5°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Lynn, not a forecast for this year.
What to do before the first frost
About 8 weeks of growing season left in Lynn before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
04/25 is the middle of 30 years of NOAA records, not a promise. Plant by 04/12 and you're betting against frost in roughly 9 years out of 10. 05/13 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Lynn compares
Lynn's growing season runs about 176 days, ranking 26,324 of 40,283 US ZIP codes measured here, longest to shortest. Within MA, it ranks 292 of 712.
Learn more
zone vs. frost date covers why Zone 7a and Lynn's frost date answer different questions. the frost range covers how to read the range around Lynn's dates instead of trusting one.