Atglen, PA 19310 Frost Dates
When can you plant in Atglen, PA?
Around 04/19 is the usual last spring frost, about 234 days away. The first fall frost typically arrives around 10/26, about 189 frost-free days later.
The USDA Plant Hardiness Zone Map puts Atglen in Zone 7a (0 to 5°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 8 weeks of growing season left in Atglen 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
04/19 is the middle of 30 years of NOAA records, not a promise. Plant by 04/01 and you're betting against frost in roughly 9 years out of 10. 05/03 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Atglen compares
At roughly 189 frost-free days, Atglen places 21,628 of 40,283 ZIP codes in this dataset. Within PA, it ranks 569 of 2,088.
Learn more
the frost range covers how to read the range around Atglen's dates instead of trusting one. local microclimates covers what one yard in Atglen can differ from the 19310 normal.