Concord, NH 03272 Frost Dates
When can you plant in Concord, NH?
Typically, the last spring freeze lands around 05/14, roughly 259 days out. The first fall frost typically arrives around 09/29, about 138 frost-free days later.
Zone 5b (-15 to -10°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 Concord, not a forecast for this year.
What to do before the first frost
About 5 weeks of growing season left in Concord before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Concord's last frost
05/14 is the middle of 30 years of NOAA records, not a promise. Plant by 04/30 and you're betting against frost in roughly 9 years out of 10. 05/28 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Concord compares
Concord's growing season runs about 138 days, ranking 37,336 of 40,283 US ZIP codes measured here, longest to shortest. Within NH, it ranks 188 of 260.
Learn more
the frost range covers how to read the range around Concord's dates instead of trusting one. local microclimates covers what one yard in Concord can differ from the 03272 normal.