Laconia, NH 03864 Frost Dates
Frost dates for Laconia, NH, ZIP 03864
The last spring frost here typically falls around 05/06, about 251 days from today. The first fall frost typically arrives around 10/06, about 151 frost-free days later.
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.
What to do before the first frost
Zone 5b around Laconia has about 6 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
How much risk comes with planting early here
05/06 is the middle of 30 years of NOAA records, not a promise. Plant by 04/26 and you're betting against frost in roughly 9 years out of 10. 05/19 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Laconia compares
At roughly 151 frost-free days, Laconia places 34,960 of 40,283 ZIP codes in this dataset. Within NH, it ranks 116 of 260.
Learn more
zone vs. frost date explains why Zone 5b and Laconia's frost date answer different questions, and the frost range explains how to read the range around Laconia's dates instead of trusting one.