Concord, NH 03304 Frost Dates
Frost dates for Concord, NH, ZIP 03304
Typically, the last spring freeze lands around 05/08, roughly 253 days out. The first fall frost typically arrives around 10/03, about 146 frost-free days later.
Concord sits in USDA Zone 6a (-10 to -5°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 6a around Concord has about 5 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.
The actual range around Concord's last frost
05/08 is the middle of 30 years of NOAA records, not a promise. Plant by 04/27 and you're betting against frost in roughly 9 years out of 10. 05/22 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Concord compares
At roughly 146 frost-free days, Concord places 36,008 of 40,283 ZIP codes in this dataset. Within NH, it ranks 160 of 260.
Learn more
the frost range explains how to read the range around Concord's dates instead of trusting one, and local microclimates explains what one yard in Concord can differ from the 03304 normal.