Laconia, NH 03890 Frost Dates
Laconia, NH: when does the frost end?
Typically, the last spring freeze lands around 05/16, roughly 261 days out. Fall's first freeze usually shows up around 09/26, roughly 129 days after the last spring frost.
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.
Stretching the season past the first frost
With roughly 4 weeks until Laconia's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Laconia's last frost
05/16 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/03 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/30 and only about 1 year in 10 sees frost after that.
Laconia against the rest of the dataset
At roughly 129 frost-free days, Laconia places 38,439 of 40,283 ZIP codes in this dataset. Within NH, it ranks 231 of 260.
Learn more
Before leaning on 03890's figures: zone vs. frost date explains why Zone 5a and Laconia's frost date answer different questions, while the frost range explains how to read the range around Laconia's dates instead of trusting one.