Ulysses, PA 16927 Frost Dates
When can you plant in Ulysses, PA?
Around 05/15 is the usual last spring frost, about 260 days away. 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.
The actual range around Ulysses's last frost
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 37,120 of 40,283 US ZIP codes measured here, longest to shortest. Within PA, it ranks 2,012 of 2,088.
Learn more
local microclimates covers what one yard in Ulysses can differ from the 16927 normal. zone vs. frost date covers why Zone 5b and Ulysses's frost date answer different questions.