Union City, PA 16438 Frost Dates
When can you plant in Union City, PA?
The last spring frost here typically falls around 04/26, about 241 days from today. The first fall frost typically arrives around 11/04, about 192 frost-free days later.
Zone 6a (-10 to -5°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Union City, not a forecast for this year.
What to do before the first frost
About 10 weeks of growing season left in Union City before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 04/26 isn't a guarantee
04/26 is the middle of 30 years of NOAA records, not a promise. Plant by 04/10 and you're betting against frost in roughly 9 years out of 10. 05/13 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Union City compares
About 192 days separate Union City's last and first frost, putting it 20,365 of 40,283 ZIP codes nationally. Within PA, it ranks 548 of 2,088.
Learn more
zone vs. frost date covers why Zone 6a and Union City's frost date answer different questions. the frost range covers how to read the range around Union City's dates instead of trusting one.