Worcester, MA 01522 Frost Dates
Frost dates for Worcester, MA, ZIP 01522
Around 04/23 is the usual last spring frost, about 238 days away. The first fall frost typically arrives around 10/21, about 181 frost-free days later.
The USDA Plant Hardiness Zone Map puts Worcester in Zone 6a (-10 to -5°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
Zone 6a around Worcester has about 8 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
04/23 is the middle of 30 years of NOAA records, not a promise. Plant by 04/11 and you're betting against frost in roughly 9 years out of 10. 05/05 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Worcester compares
About 181 days separate Worcester's last and first frost, putting it 24,379 of 40,283 ZIP codes nationally. Within MA, it ranks 204 of 712.
Learn more
the frost range explains how to read the range around Worcester's dates instead of trusting one, and local microclimates explains what one yard in Worcester can differ from the 01522 normal.