Laconia, NH 03254 Frost Dates
03254, near Laconia, NH: the frost window
Typically, the last spring freeze lands around 04/28, roughly 243 days out. Fall's first freeze usually shows up around 10/16, roughly 171 days after the last spring frost.
Laconia sits in USDA Zone 5b (-15 to -10°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
Laconia's growing season runs out in roughly 7 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 04/28 isn't a guarantee
04/28 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/15 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/09 and only about 1 year in 10 sees frost after that.
Laconia against the rest of the dataset
About 171 days separate Laconia's last and first frost, putting it 28,609 of 40,283 ZIP codes nationally. Within NH, it ranks 9 of 260.
Learn more
Two guides worth reading on 03254: zone vs. frost date, on why Zone 5b and Laconia's frost date answer different questions, and the frost range, on how to read the range around Laconia's dates instead of trusting one.