New Wilmington, PA 16142 Frost Dates
When can you plant in New Wilmington, PA?
Around 05/15 is the usual last spring frost, about 260 days away. The first fall frost typically arrives around 10/03, about 140 frost-free days later.
New Wilmington 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
About 5 weeks of growing season left in New Wilmington before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 05/15 isn't a guarantee
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. 06/01 is the safer bet, historically only a 1-in-10 chance of frost that late.
How New Wilmington compares
New Wilmington's growing season runs about 140 days, ranking 37,061 of 40,283 US ZIP codes measured here, longest to shortest. Within PA, it ranks 1,985 of 2,088.
Learn more
zone vs. frost date covers why Zone 6a and New Wilmington's frost date answer different questions. the frost range covers how to read the range around New Wilmington's dates instead of trusting one.