Coplay, PA 18037 Frost Dates
When can you plant in Coplay, PA?
The last spring frost here typically falls around 04/20, about 235 days from today. The first fall frost typically arrives around 10/24, about 184 frost-free days later.
Coplay sits in USDA Zone 7a (0 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
About 8 weeks of growing season left in Coplay before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 04/20 isn't a guarantee
04/20 is the middle of 30 years of NOAA records, not a promise. Plant by 04/06 and you're betting against frost in roughly 9 years out of 10. 05/06 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Coplay compares
Coplay's growing season runs about 184 days, ranking 23,531 of 40,283 US ZIP codes measured here, longest to shortest. Within PA, it ranks 786 of 2,088.
Learn more
zone vs. frost date covers why Zone 7a and Coplay's frost date answer different questions. the frost range covers how to read the range around Coplay's dates instead of trusting one.