Laconia, NH 03886 Frost Dates
Frost dates for Laconia, NH, ZIP 03886
Typically, the last spring freeze lands around 05/16, roughly 261 days out. The first fall frost typically arrives around 09/26, about 129 frost-free days later.
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.
What to do before the first frost
Zone 5a around Laconia has about 4 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
05/16 is the middle of 30 years of NOAA records, not a promise. Plant by 05/03 and you're betting against frost in roughly 9 years out of 10. 05/30 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Laconia compares
About 129 days separate Laconia's last and first frost, putting it 38,438 of 40,283 ZIP codes nationally. Within NH, it ranks 230 of 260.
Learn more
the frost range explains how to read the range around Laconia's dates instead of trusting one, and local microclimates explains what one yard in Laconia can differ from the 03886 normal.