Ulysses, PA 16923 Frost Dates
When can you plant in Ulysses, PA?
The last spring frost here typically falls around 05/15, about 260 days from today. The first fall frost typically arrives around 10/02, about 140 frost-free days later.
The USDA Plant Hardiness Zone Map puts Ulysses in Zone 5b (-15 to -10°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 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
At roughly 140 frost-free days, Ulysses places 37,119 of 40,283 ZIP codes in this dataset. Within PA, it ranks 2,011 of 2,088.
Learn more
zone vs. frost date covers why Zone 5b and Ulysses's frost date answer different questions. the frost range covers how to read the range around Ulysses's dates instead of trusting one.