Woburn, MA 01864 Frost Dates
Frost dates for Woburn, MA, ZIP 01864
Around 05/03 is the usual last spring frost, about 248 days away. The first fall frost typically arrives around 10/09, about 157 frost-free days later.
Woburn 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.
What to do before the first frost
Zone 6b around Woburn has about 6 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
How much risk comes with planting early here
05/03 is the middle of 30 years of NOAA records, not a promise. Plant by 04/20 and you're betting against frost in roughly 9 years out of 10. 05/20 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Woburn compares
About 157 days separate Woburn's last and first frost, putting it 33,210 of 40,283 ZIP codes nationally. Within MA, it ranks 589 of 712.
Learn more
local microclimates explains what one yard in Woburn can differ from the 01864 normal, and zone vs. frost date explains why Zone 6b and Woburn's frost date answer different questions.