Berlin, NH 03582 Frost Dates
Frost dates for Berlin, NH, ZIP 03582
Typically, the last spring freeze lands around 05/19, roughly 264 days out. The first fall frost typically arrives around 09/29, about 131 frost-free days later.
The USDA Plant Hardiness Zone Map puts Berlin in Zone 4b (-25 to -20°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 4b around Berlin 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.
The actual range around Berlin's last frost
05/19 is the middle of 30 years of NOAA records, not a promise. Plant by 05/02 and you're betting against frost in roughly 9 years out of 10. 06/02 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Berlin compares
About 131 days separate Berlin's last and first frost, putting it 38,251 of 40,283 ZIP codes nationally. Within NH, it ranks 221 of 260.
Learn more
local microclimates explains what one yard in Berlin can differ from the 03582 normal, and zone vs. frost date explains why Zone 4b and Berlin's frost date answer different questions.