Laconia, NH 03817 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
Laconia's growing season runs about 129 days, ranking 38,433 of 40,283 US ZIP codes measured here, longest to shortest. Within NH, it ranks 225 of 260.
Learn more
the frost range covers how to read the range around Laconia's dates instead of trusting one. local microclimates covers what one yard in Laconia can differ from the 03817 normal.