Laconia, NH 03237 Frost Dates
When can you plant in Laconia, NH?
The last spring frost here typically falls around 04/30, about 245 days from today. The first fall frost typically arrives around 10/18, about 170 frost-free days later.
The USDA Plant Hardiness Zone Map puts Laconia in Zone 5b (-15 to -10°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
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
At roughly 170 frost-free days, Laconia places 28,922 of 40,283 ZIP codes in this dataset. Within NH, it ranks 12 of 260.
Learn more
local microclimates covers what one yard in Laconia can differ from the 03237 normal. zone vs. frost date covers why Zone 5b and Laconia's frost date answer different questions.