Lebanon, NH 03755 Frost Dates
Lebanon, NH: when does the frost end?
The last spring frost here typically falls around 05/01, about 246 days from today. Fall's first freeze usually shows up around 10/13, roughly 162 days after the last spring frost.
Zone 5a (-20 to -15°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Lebanon, not a forecast for this year.
Stretching the season past the first frost
With roughly 7 weeks until Lebanon's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
05/01 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/21 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/15 and only about 1 year in 10 sees frost after that.
Lebanon against the rest of the dataset
At roughly 162 frost-free days, Lebanon places 31,669 of 40,283 ZIP codes in this dataset. Within NH, it ranks 43 of 260.
Learn more
Before leaning on 03755's figures: zone vs. frost date explains why Zone 5a and Lebanon's frost date answer different questions, while the frost range explains how to read the range around Lebanon's dates instead of trusting one.