Lebanon, NH 05001 Frost Dates
05001, near Lebanon, NH: the frost window
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.
Lebanon 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
Lebanon's growing season runs out in roughly 7 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
The actual range around Lebanon's last frost
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 31,673 of 40,283 ZIP codes in this dataset. Within NH, it ranks 47 of 260.
Learn more
Two guides worth reading on 05001: local microclimates, on what one yard in Lebanon can differ from the 05001 normal, and zone vs. frost date, on why Zone 5a and Lebanon's frost date answer different questions.