Claremont, NH 03255 Frost Dates
Frost dates for Claremont, NH, ZIP 03255
Typically, the last spring freeze lands around 05/02, roughly 247 days out. The first fall frost typically arrives around 10/09, about 158 frost-free days later.
The USDA Plant Hardiness Zone Map puts Claremont in Zone 5b (-15 to -10°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 5b around Claremont 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.
The actual range around Claremont's last frost
05/02 is the middle of 30 years of NOAA records, not a promise. Plant by 04/21 and you're betting against frost in roughly 9 years out of 10. 05/17 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Claremont compares
At roughly 158 frost-free days, Claremont places 32,932 of 40,283 ZIP codes in this dataset. Within NH, it ranks 80 of 260.
Learn more
local microclimates explains what one yard in Claremont can differ from the 03255 normal, and zone vs. frost date explains why Zone 5b and Claremont's frost date answer different questions.