Laconia, NH 03259 Frost Dates
When can you plant in Laconia, NH?
Around 05/06 is the usual last spring frost, about 251 days away. The first fall frost typically arrives around 10/06, about 151 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
About 6 weeks of growing season left in Laconia before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 05/06 isn't a guarantee
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
About 151 days separate Laconia's last and first frost, putting it 34,957 of 40,283 ZIP codes nationally. Within NH, it ranks 113 of 260.
Learn more
local microclimates covers what one yard in Laconia can differ from the 03259 normal. zone vs. frost date covers why Zone 5a and Laconia's frost date answer different questions.