Laconia, NH 03223 Frost Dates
Laconia, NH: when does the frost end?
The last spring frost here typically falls around 05/20, about 265 days from today. Fall's first freeze usually shows up around 09/27, roughly 128 days after the last spring frost.
Zone 5a (-20 to -15°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Laconia, not a forecast for this year.
Stretching the season past the first frost
With roughly 4 weeks until Laconia's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 05/20 isn't a guarantee
05/20 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/06 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/04 and only about 1 year in 10 sees frost after that.
Laconia against the rest of the dataset
At roughly 128 frost-free days, Laconia places 38,525 of 40,283 ZIP codes in this dataset. Within NH, it ranks 238 of 260.
Learn more
Before leaning on 03223's figures: the frost range explains how to read the range around Laconia's dates instead of trusting one, while local microclimates explains what one yard in Laconia can differ from the 03223 normal.