Berlin, NH 03581 Frost Dates
Berlin, NH: when does the frost end?
Typically, the last spring freeze lands around 05/14, roughly 259 days out. Fall's first freeze usually shows up around 09/26, roughly 133 days after the last spring frost.
Berlin sits in USDA Zone 5a (-20 to -15°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
With roughly 4 weeks until Berlin's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
05/14 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/02 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/29 and only about 1 year in 10 sees frost after that.
Berlin against the rest of the dataset
At roughly 133 frost-free days, Berlin places 38,036 of 40,283 ZIP codes in this dataset. Within NH, it ranks 217 of 260.
Learn more
Before leaning on 03581's figures: the frost range explains how to read the range around Berlin's dates instead of trusting one, while local microclimates explains what one yard in Berlin can differ from the 03581 normal.