Ulysses, PA 16941 Frost Dates
When can you plant in Ulysses, PA?
Typically, the last spring freeze lands around 05/15, roughly 260 days out. The first fall frost typically arrives around 10/02, about 140 frost-free days later.
Ulysses 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 5 weeks of growing season left in Ulysses 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
05/15 is the middle of 30 years of NOAA records, not a promise. Plant by 04/30 and you're betting against frost in roughly 9 years out of 10. 05/31 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Ulysses compares
Ulysses's growing season runs about 140 days, ranking 37,122 of 40,283 US ZIP codes measured here, longest to shortest. Within PA, it ranks 2,014 of 2,088.
Learn more
the frost range covers how to read the range around Ulysses's dates instead of trusting one. local microclimates covers what one yard in Ulysses can differ from the 16941 normal.