Laconia, NH 03246 Frost Dates
When can you plant in Laconia, NH?
Around 04/30 is the usual last spring frost, about 245 days away. The first fall frost typically arrives around 10/18, about 170 frost-free days later.
Zone 5b (-15 to -10°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Laconia, not a forecast for this year.
What to do before the first frost
About 7 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.
How much risk comes with planting early here
04/30 is the middle of 30 years of NOAA records, not a promise. Plant by 04/19 and you're betting against frost in roughly 9 years out of 10. 05/13 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Laconia compares
About 170 days separate Laconia's last and first frost, putting it 28,923 of 40,283 ZIP codes nationally. Within NH, it ranks 13 of 260.
Learn more
local microclimates covers what one yard in Laconia can differ from the 03246 normal. zone vs. frost date covers why Zone 5b and Laconia's frost date answer different questions.