Lebanon, NH 05054 Frost Dates
Lebanon, NH: when does the frost end?
Around 05/09 is the usual last spring frost, about 254 days away. Fall's first freeze usually shows up around 10/02, roughly 145 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
With roughly 5 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
05/09 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/29 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/22 and only about 1 year in 10 sees frost after that.
Lebanon against the rest of the dataset
At roughly 145 frost-free days, Lebanon places 36,169 of 40,283 ZIP codes in this dataset. Within NH, it ranks 171 of 260.
Learn more
Before leaning on 05054's figures: local microclimates explains what one yard in Lebanon can differ from the 05054 normal, while zone vs. frost date explains why Zone 5a and Lebanon's frost date answer different questions.