Claremont, NH 03745 Frost Dates
When can you plant in Claremont, NH?
Typically, the last spring freeze lands around 05/14, roughly 259 days out. The first fall frost typically arrives around 10/01, about 140 frost-free days later.
Claremont sits in USDA Zone 5b (-15 to -10°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
About 5 weeks of growing season left in Claremont 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
05/14 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. 05/29 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Claremont compares
Claremont's growing season runs about 140 days, ranking 37,031 of 40,283 US ZIP codes measured here, longest to shortest. Within NH, it ranks 180 of 260.
Learn more
local microclimates covers what one yard in Claremont can differ from the 03745 normal. zone vs. frost date covers why Zone 5b and Claremont's frost date answer different questions.