Lebanon, NH 03749 Frost Dates
When can you plant in Lebanon, NH?
The last spring frost here typically falls around 05/21, about 266 days from today. The first fall frost typically arrives around 09/26, about 127 frost-free days later.
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.
What to do before the first frost
About 4 weeks of growing season left in Lebanon before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
05/21 is the middle of 30 years of NOAA records, not a promise. Plant by 05/07 and you're betting against frost in roughly 9 years out of 10. 06/05 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Lebanon compares
About 127 days separate Lebanon's last and first frost, putting it 38,612 of 40,283 ZIP codes nationally. Within NH, it ranks 248 of 260.
Learn more
zone vs. frost date covers why Zone 5a and Lebanon's frost date answer different questions. the frost range covers how to read the range around Lebanon's dates instead of trusting one.