Hellertown, PA 18055 Frost Dates
When can you plant in Hellertown, PA?
Typically, the last spring freeze lands around 04/20, roughly 235 days out. The first fall frost typically arrives around 10/24, about 184 frost-free days later.
Hellertown 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 Hellertown 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 Hellertown compares
Hellertown's growing season runs about 184 days, ranking 23,488 of 40,283 US ZIP codes measured here, longest to shortest. Within PA, it ranks 771 of 2,088.
Learn more
the frost range covers how to read the range around Hellertown's dates instead of trusting one. local microclimates covers what one yard in Hellertown can differ from the 18055 normal.