Berlin, NH 04267 Frost Dates
04267, near Berlin, NH: the frost window
Around 05/12 is the usual last spring frost, about 257 days away. Fall's first freeze usually shows up around 09/29, roughly 139 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Berlin in Zone 5a (-20 to -15°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
Berlin's growing season runs out in roughly 5 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
The actual range around Berlin's last frost
05/12 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/30 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/27 and only about 1 year in 10 sees frost after that.
Berlin against the rest of the dataset
At roughly 139 frost-free days, Berlin places 37,216 of 40,283 ZIP codes in this dataset. Within NH, it ranks 186 of 260.
Learn more
Two guides worth reading on 04267: the frost range, on how to read the range around Berlin's dates instead of trusting one, and local microclimates, on what one yard in Berlin can differ from the 04267 normal.