Lebanon, NH 03284 Frost Dates
When can you plant in Lebanon, NH?
Around 05/21 is the usual last spring frost, about 266 days away. The first fall frost typically arrives around 09/26, about 127 frost-free days later.
Lebanon sits in USDA Zone 5b (-15 to -10°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.
The actual range around Lebanon's last frost
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 38,609 of 40,283 ZIP codes nationally. Within NH, it ranks 245 of 260.
Learn more
zone vs. frost date covers why Zone 5b 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.