Claremont, NH 05037 Frost Dates
Frost dates for Claremont, NH, ZIP 05037
Around 05/16 is the usual last spring frost, about 261 days away. The first fall frost typically arrives around 09/29, about 136 frost-free days later.
Zone 5a (-20 to -15°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 Claremont, not a forecast for this year.
What to do before the first frost
Zone 5a around Claremont 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.
How much risk comes with planting early here
05/16 is the middle of 30 years of NOAA records, not a promise. Plant by 05/01 and you're betting against frost in roughly 9 years out of 10. 05/31 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Claremont compares
About 136 days separate Claremont's last and first frost, putting it 37,650 of 40,283 ZIP codes nationally. Within NH, it ranks 209 of 260.
Learn more
the frost range explains how to read the range around Claremont's dates instead of trusting one, and local microclimates explains what one yard in Claremont can differ from the 05037 normal.