Berlin, NH 04964 Frost Dates
04964, near Berlin, NH: the frost window
Around 05/23 is the usual last spring frost, about 268 days away. Fall's first freeze usually shows up around 09/24, roughly 123 days after the last spring frost.
Berlin sits in USDA Zone 4b (-25 to -20°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.
Stretching the season past the first frost
Berlin's growing season runs out in roughly 4 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
05/23 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/09 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/05 and only about 1 year in 10 sees frost after that.
Berlin against the rest of the dataset
About 123 days separate Berlin's last and first frost, putting it 38,885 of 40,283 ZIP codes nationally. Within NH, it ranks 255 of 260.
Learn more
Two guides worth reading on 04964: 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 04964 normal.