Lebanon, NH 03768 Frost Dates
Lebanon, NH: when does the frost end?
Typically, the last spring freeze lands around 05/09, roughly 254 days out. Fall's first freeze usually shows up around 10/02, roughly 145 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
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.
The actual range around Lebanon's last frost
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
About 145 days separate Lebanon's last and first frost, putting it 36,166 of 40,283 ZIP codes nationally. Within NH, it ranks 168 of 260.
Learn more
Before leaning on 03768's figures: local microclimates explains what one yard in Lebanon can differ from the 03768 normal, while zone vs. frost date explains why Zone 5a and Lebanon's frost date answer different questions.