Laconia, NH 03849 Frost Dates
03849, near Laconia, NH: the frost window
Around 05/16 is the usual last spring frost, about 261 days away. Fall's first freeze usually shows up around 09/26, roughly 129 days after the last spring frost.
Laconia 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
Laconia's growing season runs out in roughly 4 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
How much risk comes with planting early here
05/16 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/03 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/30 and only about 1 year in 10 sees frost after that.
Laconia against the rest of the dataset
Laconia's growing season runs about 129 days, ranking 38,436 of 40,283 US ZIP codes measured here, longest to shortest. Within NH, it ranks 228 of 260.
Learn more
Two guides worth reading on 03849: zone vs. frost date, on why Zone 5a 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.