Berlin, NH 04261 Frost Dates
Berlin, NH: when does the frost end?
Typically, the last spring freeze lands around 05/19, roughly 264 days out. Fall's first freeze usually shows up around 09/25, roughly 129 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
05/19 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/05 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/01 and only about 1 year in 10 sees frost after that.
Berlin against the rest of the dataset
At roughly 129 frost-free days, Berlin places 38,445 of 40,283 ZIP codes in this dataset. Within NH, it ranks 235 of 260.
Learn more
Before leaning on 04261's figures: local microclimates explains what one yard in Berlin can differ from the 04261 normal, while zone vs. frost date explains why Zone 5a and Berlin's frost date answer different questions.