Lebanon, PA 17046 Frost Dates
When can you plant in Lebanon, PA?
Typically, the last spring freeze lands around 04/20, roughly 235 days out. The first fall frost typically arrives around 10/25, about 185 frost-free days later.
The USDA Plant Hardiness Zone Map puts Lebanon in Zone 7a (0 to 5°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
About 8 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.
Why 04/20 isn't a guarantee
04/20 is the middle of 30 years of NOAA records, not a promise. Plant by 04/05 and you're betting against frost in roughly 9 years out of 10. 05/07 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Lebanon compares
Lebanon's growing season runs about 185 days, ranking 23,073 of 40,283 US ZIP codes measured here, longest to shortest. Within PA, it ranks 689 of 2,088.
Learn more
the frost range covers how to read the range around Lebanon's dates instead of trusting one. local microclimates covers what one yard in Lebanon can differ from the 17046 normal.