Lebanon, NH 03753 Frost Dates
03753, near Lebanon, NH: the frost window
Around 05/21 is the usual last spring frost, about 266 days away. Fall's first freeze usually shows up around 09/26, roughly 127 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Lebanon in Zone 5a (-20 to -15°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
Lebanon's growing season runs out in roughly 4 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
How much risk comes with planting early here
05/21 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/07 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/05 and only about 1 year in 10 sees frost after that.
Lebanon against the rest of the dataset
At roughly 127 frost-free days, Lebanon places 38,613 of 40,283 ZIP codes in this dataset. Within NH, it ranks 249 of 260.
Learn more
Two guides worth reading on 03753: the frost range, on how to read the range around Lebanon's dates instead of trusting one, and local microclimates, on what one yard in Lebanon can differ from the 03753 normal.