Laconia, NH 03875 Frost Dates
When can you plant in Laconia, NH?
Around 05/16 is the usual last spring frost, about 261 days away. 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
About 4 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
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
At roughly 129 frost-free days, Laconia places 38,437 of 40,283 ZIP codes in this dataset. Within NH, it ranks 229 of 260.
Learn more
local microclimates covers what one yard in Laconia can differ from the 03875 normal. zone vs. frost date covers why Zone 5a and Laconia's frost date answer different questions.