Laconia, NH 03853 Frost Dates
When can you plant in Laconia, NH?
Around 04/28 is the usual last spring frost, about 243 days away. The first fall frost typically arrives around 10/16, about 171 frost-free days later.
Laconia sits in USDA Zone 5b (-15 to -10°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 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.
Why 04/28 isn't a guarantee
04/28 is the middle of 30 years of NOAA records, not a promise. Plant by 04/15 and you're betting against frost in roughly 9 years out of 10. 05/09 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Laconia compares
Laconia's growing season runs about 171 days, ranking 28,610 of 40,283 US ZIP codes measured here, longest to shortest. Within NH, it ranks 10 of 260.
Learn more
zone vs. frost date covers why Zone 5b and Laconia's frost date answer different questions. the frost range covers how to read the range around Laconia's dates instead of trusting one.