Concord, NH 03258 Frost Dates
When can you plant in Concord, NH?
The last spring frost here typically falls around 05/08, about 253 days from today. The first fall frost typically arrives around 10/03, about 146 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.
How much risk comes with planting early here
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
Concord's growing season runs about 146 days, ranking 36,004 of 40,283 US ZIP codes measured here, longest to shortest. Within NH, it ranks 156 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 03258 normal.