Laconia, NH 03850 Frost Dates
Laconia, NH: when does the frost end?
Around 05/06 is the usual last spring frost, about 251 days away. Fall's first freeze usually shows up around 10/06, roughly 151 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Laconia in Zone 5b (-15 to -10°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
With roughly 6 weeks until Laconia's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Laconia's last frost
05/06 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/26 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/19 and only about 1 year in 10 sees frost after that.
Laconia against the rest of the dataset
Laconia's growing season runs about 151 days, ranking 34,959 of 40,283 US ZIP codes measured here, longest to shortest. Within NH, it ranks 115 of 260.
Learn more
Before leaning on 03850's figures: local microclimates explains what one yard in Laconia can differ from the 03850 normal, while zone vs. frost date explains why Zone 5b and Laconia's frost date answer different questions.