Union Dale, PA 18842 Frost Dates
Frost dates for Union Dale, PA, ZIP 18842
Typically, the last spring freeze lands around 05/14, roughly 259 days out. The first fall frost typically arrives around 10/01, about 140 frost-free days later.
Union Dale sits in USDA Zone 6a (-10 to -5°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
Zone 6a around Union Dale has about 5 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
Why 05/14 isn't a guarantee
05/14 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. 05/29 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Union Dale compares
About 140 days separate Union Dale's last and first frost, putting it 37,171 of 40,283 ZIP codes nationally. Within PA, it ranks 2,037 of 2,088.
Learn more
the frost range explains how to read the range around Union Dale's dates instead of trusting one, and local microclimates explains what one yard in Union Dale can differ from the 18842 normal.